Category Archives: Sealant

Polyurethane Construction Adhesive Sealant

Polyurethane Construction Adhesive Sealant

When you need to bond concrete, wood and metals together or fill cracks in the exterior of a structure, choose a premium one-part moisture curing polyurethane construction adhesive sealant. These commercial-grade products are highly durable and versatile.

Before applying, make sure surfaces are clean and free of oil, dust, dirt and other materials that could prevent a strong bond. Review product Technical Data Sheets (TDS) for surface preparation recommendations specific to the adhesive you choose.


Polyurethane construction adhesive sealants are durable materials, able to withstand the elements. These adhesives are resistant to the weather, water, chemicals and UV light. They also have a high tensile strength to withstand structural movement. They are available in a variety of Shore A hardnesses, open time and colors to suit your needs. They are ideal for sealing joints around windows, doors and siding as well as framing and joists. They are also ideal for sealing concrete foundations.

A premium one-part, moisture curing, non-sag elastomeric commercial-grade polyurethane adhesive sealant that provides a long lasting flexible and durable seal for filling exterior gaps, joints and cracks. It offers superior adhesion to a wide variety of substrates, including glass, metals, brick, masonry, polyurethane construction adhesive sealant wood, plastics and vinyl. It will form a skin within 2 to 4 hours and is fully cured in 24 to 48 hours. Paintable and stainable when cured.

Polyurethanes offer a much higher tensile and shear strength than silicone sealants, making them ideal for heavy-duty projects like installing and repairing window frames, garage framing, roofing and sill plates. They are also resistant to corrosion and abrasions. These adhesives are also ideal for sealing cracks in walls and floors and repairing leaks in water fixtures, faucets, toilets and more.

When choosing the right construction adhesive, make sure to follow the manufacturer’s instructions for preparation and application. Different surfaces require different methods for getting them ready for the adhesive, including removing dirt and dust from concrete, scrubbing rust off of metal, and removing old caulking or glue from the surface. Once you have the surfaces clean, apply a smoothing agent to help get a uniform appearance.

Moisture Resistance

The moisture resistance of polyurethane adhesive sealants varies by formulation. Generally, these systems can withstand moisture well and are applicable in challenging environments and tricky locations where the substrates may be exposed to water or atmospheric humidity. This allows the adhesive to work effectively without damaging the substrates or allowing the bond to fail.

These construction adhesives can be used for bonding a wide variety of materials such as concrete, wood, plastics, galvanized steel and coated metal. They can also be used for sealing construction expansion joints. They are able to withstand a wide range of temperatures and have good elasticity.

One-component, moisture-curing PU is often used for door trim, instrumental panels and bonding steel frames to side glass windshields in transportation. Liquid, one-component PU has a fast tack and skin time and can be painted to improve the appearance of the final bond. This type of construction adhesive is available in cartridges, sausage packs and bulk formats to meet different needs and applications.

One-component, low modulus PU is a highly insulating and gap filling adhesive that can provide a flexible seal for construction joints. This enables them to withstand up to 50% movement without failing and also keep water and air out of the joint. These are commonly used for sealing a wide variety of construction materials including cement-based materials, brick, ceramic and glass, masonry and galvanized sheet metal. Rigid heat curing PU is another option for construction applications as it can be processed faster than its moisture curing alternative and forms stronger bonds.

UV Resistance

Unlike silicone sealants, polyurethane construction adhesive sealants are color stable, do not chalk or yellow and offer superior UV resistance. They are also durable and flexible, meaning they can withstand expansion and contraction due to weather changes. They do not drip or sag, and they are resistant to water, moisture, chemicals, salts and other contaminates.

The best polyurethane caulk will provide a strong bond to many surfaces, including aluminum, concrete, glass, masonry and plastic. It will not sag, crack or discolor and is easy to cut and tool. It will withstand extreme temperatures for a strong, long-lasting bond. It is available in a variety of colors to match your project’s color scheme.

Polyurethane construction adhesive sealant is available in a wide range of Shore A hardness, open time and color options to suit your specific project needs. It is ideal for sealing joints in a wide variety of materials, including concrete, wood and metal, in addition to ceramics and fiberglass. It is also suitable for use in joints exposed to the elements, such as marine applications.

3M(tm) Polyurethane Adhesive Sealant 560 offers a strong bond between dissimilar substrates, and it performs in a wide temperature range for an excellent finished product. It is an effective alternative to mechanical fasteners and can replace rivets in many applications. It is also paintable to improve the appearance of your finished product.

Chemical Resistance

Polyurethane construction adhesive sealant is highly resistant to a variety of chemicals including hydrochloric acid, salt water, potassium hydroxide and many more. It can also withstand a wide range of temperatures and atmospheric hydrocarbons and is non-toxic to humans and animals.

Akfix offers a wide range of one-component and two-component liquid polyurethane adhesives that provide strong bonding and gap sealing for a wide variety of applications. These include construction, automotive, and industrial projects. Some of these products feature a wide operating temperature range and can be used with both metals and plastics. In addition, the adhesives are available in different viscosities for a choice of application thicknesses. There are even options that can be used as a caulking agent, or to fill small gaps and holes.

These adhesives can be applied to almost any surface and provide a high level of stress recovery polyurethane construction adhesive sealant to resist being bent or pulled. They also offer a quick curing time and can be painted to match the surrounding surface. They can be diluted with water to increase their viscosity for easier application and can even be applied to non-primed concrete.

Another advantage of these polyurethane construction adhesives is their excellent UV resistance. The reason for this is that polyurethane is an organic material and, unlike silicone, it does not deteriorate under UV exposure. This means that it can be used in outdoor applications without the risk of a loss of performance or strength over time. This can be particularly useful in the aviation industry, where the aircraft is exposed to extreme temperature changes from summer heat on the ground to below-freezing conditions at cruising altitudes.

High Temperature Sealant

High Temperature Sealant

High temperature sealant is essential for many applications. It is designed to hold up against high temperatures and other harsh conditions that normal sealants can’t.

Choose the right high temperature sealant for your application by understanding what you need it to do. Some factors to consider are the temperature range it must withstand, fire resistance and flexibility.

Heat Resistant

Heat resistant sealants, also known as high temperature silicone or caulk, are specifically designed to withstand extreme temperatures without losing their strength or flexibility. They have a much higher melting point than regular sealants and are often used in applications such as electrical insulation or the sealing of joints, cracks or gaps in areas exposed to continuous vibration or extreme heat.

Choosing the right heat resistant adhesive for your application can be tricky. You will need to determine the maximum and minimum temperature that the area is likely to experience as well as the type of chemical and moisture resistance you require. Some heat resistant silicones can be used as both an adhesive and a sealant, while others may only be suitable for use as a sealant. Before purchasing a product, make sure that it is clearly labelled as a heat resistant or high temperature silicone and not just a general silicone.

Vitcas(r) heat resistant sealant is a ready mixed high temperature sealing and caulking paste which can be applied to a wide variety of surfaces including ceramics, glass, metal and other silica based materials. It is able to withstand up to 1300oC and offers good adhesion and gap filing properties. It is ideal for a range of applications such as sealing or fixing ceramics, glass and metal and can be used in both indoor and outdoor environments.

Fire Retardant

Fire retardant high temperature sealant is a great solution for areas that need to resist the spread of flames, smoke and gases. This type of silicone sealant is typically odourless, safe to use and adheres to a wide range of materials including metal, glass, plastic and wood. It is also able to withstand harsh chemicals, weather and vibration. It is available in a variety of sizes and colors so you can find the right one for your project.

A fire resistant silicone sealant is designed to be used as a filler high temperature sealant or bonding agent for applications such as sealing seams and joints in fireplaces, ovens, stoves and flues. It intumesces when exposed to a fire, blocking the passage of flames, smoke and toxic gases. It is suitable for use in residential and commercial applications.

When applying a fire resistant high temperature sealant, be sure to follow the manufacturer’s instructions for application. It is important to high temperature sealant clean the surface before using, and to allow the sealant to cure completely before placing weight on it. You should also avoid exposing the sealant to direct sunlight, as it may crack or break if it is subjected to intense heat for prolonged periods of time. A fire-resistant sealant can be purchased online or at a hardware store. It is recommended that you purchase a high-quality brand from a reputable manufacturer or supplier that can provide warranty coverage on their products.

Chemical Resistant

There are different types of high temperature silicone sealant available depending on the level of flexibility and durability you need. Some can withstand extremely hot temperatures, while others are more flexible and better suited for areas that expand and contract often. You can also choose from a range of colours to match the look of your project.

For example, a red coloured acetic cure silicone can be used in sanitary applications such as sealing baths and showers, though it is also highly durable. It is resistant to mildew, will not crack or discolour and can withstand temperatures of up to 204degC continuous. This sealant is very strong and elastic with a breaking elongation of over 300%.

Another good choice is a black industrial silicone. It can be used in a variety of industrial projects including sealing stove and furnace vent pipes, encapsulating heating elements, moving oven belts, sealing bag filters on smokestacks and more. This high-temperature silicone has a resistance to oils, gasses and other chemicals, while still providing an excellent grip on surfaces and is unaffected by extreme temperatures. It is non-slumping and can be painted or sanded once it has fully cured.

Easy to Apply

High-temperature silicone sealants are easy to apply. They can be used to seal and encapsulate any number of materials, including glass, enamels, and smooth metals. They are also resistant to aging, vibrations, and shock. They are also easy to clean up after application. These types of sealants work well for sealing gaps, seams, and cracks around appliances, heating vents, and furnaces.

When applying a high-temperature sealant, it is important to follow safety guidelines. Always wear protective eye-wear, and avoid letting the adhesive come into contact with your skin. Additionally, it is best to take breaks while working with this product, as it can produce dangerous fumes. Additionally, you should never mix the product with other chemicals.

A good way to protect your hands while applying the product is to use a caulking gun. This will allow you to push the sealant ahead of the nozzle without straining or hurting your hands. After the sealant has been applied, it will dry to the touch within 30 minutes and will be fully cured within 24 hours. This makes it a great choice for many different household projects, such as sealing the edges of a ceramic hot plate, repairing cracks around windows, or closing up the gap around heating vents and doors. This will help you reduce energy costs by keeping heat in and cold out.

Construction Adhesives and Sealants

Construction Adhesives and Sealants

Construction adhesives and sealants allow for strong bonding in building projects. They also help distribute stress and weight across bonded surfaces, ensuring structural integrity. They can also resist exposure to moisture and extreme temperatures.

The type of materials you’re bonding will determine what kind of construction adhesive is right for you. There are a number of options available, from one-component polyurethane construction adhesives like Loctite to heavy duty woodworking mastics.


There are several different types of construction adhesives and sealants, based on their chemistries and their intended use. Some of the most common types include one-component, two-component, and sealant tapes. One-component construction adhesives are typically the most versatile and easily applied. Their chemistries may include silicone, urethane, and acrylics. Two-component construction adhesives are more complex and require mixing equipment, but they often provide higher strength and durability than single component options. They can be made of epoxies, polyamine hardeners, cements, and methyl methacrylate (MMA). Sealant tapes are usually butyl-based.

Engineers must consider the substrate materials and environmental conditions that a bond must withstand when choosing an adhesive or sealant for construction applications. Additional considerations may include the tensile and compressive stress construction adhesives and sealants levels, thermal expansion and contraction rates, and chemical exposure.

The physical form of a construction adhesive or sealant can also affect its application and curing characteristics. Liquid adhesives are often the easiest to apply, but they can leak or sag during their curing time. They are most effective when used for adhesions that require gap filling and are best applied using tools such as a brush, roller, or caulking gun.

Those in the form of a paste are typically more viscous and can be more difficult to spread, but they offer excellent gap filling and non-sagging properties. They are ideal for adhesions that require thick gap filling mastics or when a long working life is required.


There are many different uses for construction adhesives, including bonding and sealing materials together, reducing the need for fasteners, and filling gaps in uneven surfaces. Adhesives also can help increase the strength of a surface by providing more uniform distribution of load and stress, unlike fasteners alone.

There is a broad variety of chemistries used in construction adhesives and sealants. Generally, they are divided into three categories: physically hardened, chemically cured and pressure-sensitive. Physically hardened construction adhesives, such as cyanoacrylates and methyl methacrylates, are typically strong, flexible and resistant to temperature and humidity. They start out in liquid form and then become physically hardened upon application.

Water-based and solvent-based construction adhesives are typically used in thin applications. However, these types of adhesives may shrink during drying, leaving spaces that require re-adhesion or repairs. They need to be used in a controlled environment, such as an enclosed area or with a respirator.

Non-shrinkage construction adhesives, such as acrylic emulsions and PVAc polymer adhesives, are designed to be used in thicker applications. They contain mineral fillers to lower cost, improve gap filling properties and provide a viscosity that can be applied with a notched trowel without sagging. These types of construction adhesives offer good shear strength and good resistance to cold temperatures up to -40°C. These types of construction adhesives can be used in applications such as flooring, wood molding and trim, stair assemblies and ceramic and glass tile installation.


Adhesives and sealants reduce assembly construction adhesives and sealants time, increase durability and help create a stronger finished product. They can also distribute stresses across the bond line, reducing failure risks. They can also eliminate the need for fasteners, resulting in cost savings and material waste reduction.

Many of these chemicals are flammable, requiring proper storage to prevent fire hazards. They may also pose a health risk to workers if used incorrectly, so users should read the technical data sheets and safety labels carefully. Some adhesives may emit dust or toxic fumes during curing, so workers should wear protective equipment such as respirators, gloves and eye protection, and ensure that work areas are adequately ventilated.

Look for options that are labeled as low- or no-VOC, which means that they don’t release harmful chemicals into the atmosphere during use. Avoid those that require mixing or activation, as these will likely release dangerous chemicals into the air for extended periods of time. Many companies offer environmentally friendly adhesives and sealants, which are a great choice for any job that requires these types of chemicals.


The conditions under which construction adhesives are used affect their strength, durability and longevity. You’ll need to choose an adhesive that is suitable for the environment in which it will be applied and cured, such as indoors or outdoors, and whether the surfaces you’re bonding are exposed to moisture or extreme heat.

Some construction adhesives emit toxic fumes, dust or vapors that pose a health risk and require specific precautions during application and cleanup. Check the product’s safety data sheet for details on personal protective equipment, such as eye protection and dust masks, and refer to the manufacturer’s recommendations for barrier creams that protect skin from the chemicals.

Once cured, most construction adhesives are safe to use and do not present any risks. However, exposure to uncured adhesives can cause a variety of problems, including fires and explosions, surface damage, odor, and skin irritation. Therefore, you must store all adhesives in designated chemical storage areas and follow all handling, mixing, application, and disposal instructions for each product.

If you’re looking for a strong construction adhesive that can withstand a lot of pressure, look no further than the Power Grab Heavy Duty Construction Adhesive from Loctite. This strong, long-lasting glue is perfect for applications such as stair assemblies, wood molding and trim, vinyl cove and stair nosing, and more. Plus, it is weather-resistant, paintable, and has a low VOC count.

Adhesive Silicone

Adhesive Silicone

Adhesive silicone is a versatile sealant that can be used for anything from household tasks to bonding components in outer space. It can withstand extreme temperatures and resist aging, making it ideal for many different applications.

When using silicone adhesives it is important to consider substrate wettability. This is the ability of a substrate to accept a liquid adhesive and can be determined by its surface energy value.

Easy to Apply

Adhesive silicone can be used on a variety of surfaces. Its non-reactive, chemically stable properties make it a good choice for bonding different materials such as metals and glass. It also resists extreme temperatures, making it a good choice for high-performance and long-lasting applications.

Unlike other adhesives, which may have negative effects on your health, adhesive silicone is safe to use and does not release harmful fumes. It is also very easy to apply, requiring no significant preparation. It is a good idea to clean the surface of the item you are applying the silicone to, though, as it could have a residue that will prevent the silicone from adhering properly.

Before applying the adhesive, sand it down with low-grit sandpaper or use a fine grit steel wool to remove any corrosion. After this, wipe down the area with a lint-free cloth. You should then spray the surface with a solvent-based Activator/Accelerator or our Poly Prep to promote adhesion.

Once the surface is ready, simply apply a thick coat of the product to the desired area. Then, wait for it to set before attaching anything else. Depending on the type of silicone you have chosen, this will take a different amount of time. Some are fast setting, while others will require more time to cure fully. For best results, you should use an RTV silicone that is formulated for high temperature applications.

Strong Adhesion

Despite their flexible nature, silicone adhesives are extremely strong and durable. This makes them ideal for bonding to difficult-to-bond-to surfaces, especially in demanding applications that require the adhesive to maintain its strength adhesive silicone under high temperatures, water submersion, vibrations and other environmental stresses. These features make silicone adhesives suitable for a wide range of industries, including electronics, automotive and life science. For example, silicone-based adhesives can be used for the assembly of medical catheters, and they are often applied to the surface of printed circuit boards to provide electrical insulation.

To achieve their robust adhesion, silicone adhesives rely on both physisorption and chemisorption mechanisms of adhesion. The silanol groups on the PDMS backbone react with surface chemical groups found on many common substrates, forming Si-O-Si bonds. This mechanism allows the silicone to adhere to the substrate without being pretreated with a primer.

However, some substrates are difficult to stick to with a single silicone adhesive, which is why some formulations of silicone adhesive include a primer to facilitate this reaction. These primers are typically a mixture of organosilanes, which can react with the silanol groups on the PDMS to form Si-O-Si bonds with the substrate.

Another way to improve the adhesion of a silicone adhesive is by using a pressure sensitive silicone (PSA). These are synthetic elastomers that bond when they are exposed to pressure. These adhesives are perfect for use on surfaces that are not easy to stick to, such as release liners and low surface energy (LSE) materials. They also have excellent moisture resistance and can withstand exposure to chemicals and solvents.

Weather Resistant

When cured, silicone sealants can resist harsh weather elements such as rain, humidity and hot and cold temperatures. This durability makes it a great choice for outdoor projects, such as sealing gutters and vents or caulking windows and doors. Silicone can also be used to seal ductwork, appliances and other household items. Its weather resistance means it doesn’t shrink, crack or peel and can keep a secure seal in any climate.

There are many different types of silicone sealants available to meet specific applications. For example, sanitary sealants, like the GE GE012A, are ideal for use in bathrooms and kitchens because they can help prevent mold and mildew. Frame silicone sealants, such as the GE 31314, are durable and easy to apply to window or door frames. High-temperature silicones, like the Vitcas SS-30, are designed to handle high heat and are resistant to aging, shock and vibration.

Before you use a silicone sealant, make sure it’s the right one for your project. There are several things to consider when choosing a silicone adhesive, including its modulus and curing time. Low modulus sealants will need little force to stretch and are more elastic, while higher-modulus silicones are stiffer. Acid-cure silicones release vinegar-smelling acetic acid as they cure and can corrode metal, while neutral alkoxy silicones bond well to glass, plastics and aluminium but take longer to dry.


Silicone adhesives have low toxicity before, during and after curing. This makes them safer to work with than most other glues. Some silicone systems, like MasterSil 711, are non-corrosive and designed to be used with electronics while others, such as MasterSil 151Med, meet USP Class VI standards for medical applications and are biocompatible. Other silicone systems, like Kwik-Sil and Kwik-Cast, have platinum complex catalysts that are not sensitive to contamination from amines or animal tissue and offer rapid curing times of only a few minutes.

These properties make silicone adhesive tapes ideal adhesive silicone for use in medical and microfluidic applications as well as for bonding dissimilar materials. Additionally, silicone adhesives are inert and biocompatible which means they can be used around living tissue without causing irritation. They also have excellent moisture resistance and conformability. These characteristics, along with their chemical stability and adherence to LSE surfaces, make them ideal for use in research laboratories.

Pressure Sensitive Adhesives (PSA) are a type of silicone adhesive that creates a strong bond when exposed to pressure. PSAs can be applied to a variety of substrates and are often used in the automotive and aerospace industries. They are also commonly used for potting and sealing in electronic assemblies. They can be cured with UV light and are resistant to vibrations, shocks and temperature changes.

Advantages of Polyurethane Foam

Advantages of Polyurethane Foam

Polyurethane foam is one of the most commonly used construction materials on the market today. Its many benefits make it a popular choice among contractors and homeowners alike.

However, the chemicals used to manufacture polyurethane foam – diisocyanates (methylene diphenyl diisocyanate [MDI] and toluene diisocyanate [TDI]) can be harmful to humans. These chemicals are known to damage DNA.

It’s Easy to Use

Polyurethane foam is widely used in a variety of applications in your home. You can use it to fill gaps and cracks, seal insulation, or create a sturdy base for furniture or countertops. It’s also used to make mattress and chair cushions, as well as car seat upholstery.

There are multiple types of PU foam, with some being more durable than others. For example, closed-cell PU foam is generally more rigid than open-cell foam. This type of PU foam is often preferred for construction projects because it’s more resilient and longer-lasting. Whether you choose a PU spray foam or another type of PU foam, it’s important to follow safety instructions when using it. The chemicals used in PU spray foam can be toxic and cause irritation to the eyes, nose, throat, and skin. For this reason, you should always use proper ventilation when working with PU foam.

In addition to insulating and sealing, PU spray foam is also used to create a strong adhesive. This type of PU glue doesn’t soak paper, so it can hold items like photos, maps, and other thick materials without damage. It’s also a fast-drying glue, so it’s a convenient choice for DIYers. Just be sure to check the ‘best by’ date on the can to ensure you’re getting the freshest batch.

It’s Durable

Polyurethane Foam is extremely durable and maintainable. Depending on the type of use, it can last over 50 years for a roof insulation system, over 25 years in refrigerators or more than 20 years for motor car bumpers. These long life spans make polyurethane a viable and sustainable option for building materials.

Using polyurethane foam in buildings can reduce energy costs by as much as 20% and help to reduce the heat island effect. It also adds comfort to a building and helps to increase longevity of the structure. Polyurethane is light, adding little additional weight to the construction system. In addition, a spray application of polyurethane foam insulation requires no special skills to apply, which can save time and money.

Marine Applications

Rigid polyurethane foam insulates boats from weather and temperature extremes, improves the strength of metal and wood stud cavities, provides abrasion and tear resistance, increases load-bearing capacity and is easy to work with. It can even be molded to the shape of a boat, making it more attractive to buyers and giving owners peace of mind that their boat will last longer.

Flexible polyurethane foam can be used in a Polyurethane Foam variety of consumer and commercial products including bedding, furniture and automotive interiors. It is lightweight and comfortable, and can be created in a wide range of thicknesses and firmnesses.

It’s Versatile

Polyurethane foam is used in a wide variety of applications in everyday life. Its versatility and affordable price make it a popular choice for consumers, manufacturers, and businesses alike.

Generally, polyurethane is formed by reacting a type of alcohol called a “polyol”—with more than two hydroxyl groups—and a compound known as diisocyanate. In addition, other ingredients like catalysts, fillers, and additives are often added to the mix.

Rigid polyurethane foam is commonly found in buildings as insulation material. It is also found in many different home products, including kitchen sponges, sofa cushions, and car seats. Foam-core panels add design flexibility to new homes and remodeling projects, as they can be molded to create unique shapes and profiles for walls, roofs, and garage doors.

Flexible polyurethane foam (FPF) has many important roles in the medical industry, from improving patient comfort to contributing to treatments and helping to protect equipment. For instance, the cellular structure of PUF makes it a desirable material for cushioning in medical devices, and its ability to mold into complex shapes is a big advantage.

Polyurethane foam’s versatile nature also makes it a great packaging material. It is soft, non-abrasive, durable, and Polyurethane Foam can be molded into form-fitted containers that are designed to protect everything from fragile souvenirs to expensive industrial components. To further enhance its packing abilities, polyurethane can be mixed with gases, such as carbon dioxide or dry air. This is called gas nucleation and can help improve the mixing quality, cell geometry, or density of the foam.

It’s Affordable

Polyurethane foam can be affordable for a variety of projects and applications. Polyurethane foam is very durable and can last a long time with proper maintenance. The thickness of the foam and the density determine how long it will last. A higher density foam will last longer than a lower density foam. The cost of polyurethane foam increases with the density of the product, however it is still much more economical than many other materials.

Rigid polyurethane foam is an excellent choice for insulating your home, commercial structure or building. Polyurethane foam insulation creates an airtight barrier that reduces heat transfer, which can lead to lower energy bills and a more comfortable home. Spray polyurethane foam roofing systems are also durable, low-maintenance and can be installed over existing roofs.

Foam packaging can be a more cost-effective, safe and secure way to transport large industrial parts or fragile electronics. Foam can be cut to the exact dimensions of a specific product and then filled with air or a combination of air and a filler material like vermiculite or epoxies for added protection.

Closed-cell polyurethane foam is strong, durable and rigid. It is used for a wide range of applications including marine, aerospace, construction and recreation. Open-cell foams are lighter and less dense but still offer good cushioning. They are commonly used for shock absorbtion or as a lightweight filler in furniture and construction.

Polyurethane Construction Adhesive Sealant

Polyurethane Construction Adhesive Sealant

Polyurethane construction adhesive sealant is a versatile material that can be used in many different applications. It provides strong, flexible durable elastomeric bonds that seal against the elements. It is available in a variety of Shore A hardness, open time and colors to meet application needs.

Fourteen tubes of moisture-curing polyurethane sealant and an older suburban Western Pennsylvania home made for a do-it-yourself weekend project that delivered noteworthy energy savings. It also helped conduct a life-cycle assessment (LCA).

High UV Resistance

Polyurethane sealants are highly durable and resistant to weather extremes. They are also flexible and can withstand movement in joints, cracks and seams. This type of construction sealant is ideal for a variety of exterior applications, including window installation and roof sealing. They provide a strong and long-lasting bond to materials, keeping water and air from damaging the structure and preventing mold and mildew growth.

One of the best construction adhesive sealants available is Loctite PL S40 Polyurethane Window, Door & Siding Sealant. This high-strength formula is non-staining and paintable. It offers UV resistance and complies with environmental requirements for low VOCs. It can be used on many different surfaces, such as wood, aluminum, masonry and concrete.

Another great option is 3M(tm) Polyurethane Adhesive Sealant 560. This high-strength and low-VOC product is perfect for panel bonding, vehicle flooring attachment and transportation manufacturing (bus, rail, truck, trailer). It can even replace mechanical fasteners in some situations. This product can be applied in temperatures ranging from -40degF/-40degC to 194degF/90degC and provides a strong bond to a variety of substrates. Once skin forms, it can be painted to improve the final finish.

Polyurethane caulks are designed to meet your specific needs. Choose from a variety of Shore A hardness, open times and colors to meet your requirements. These products can be easily dispensed using a manual or pneumatic applicator. They are available in cartridges, sausage packs and drums to help you save time and money.

High Adhesion

The chemistry behind polyurethane adhesives and sealants is different from other types of glue. The result is an elastomeric construction adhesive that can be used for sealing gaps and cracks in construction projects. High-strength PU adhesives have great adhesion and high elasticity. They can also resist harsh environments, like hot or cold polyurethane construction adhesive sealant temperatures and moisture. There are many one-component polyurethanes that can be applied to a variety of surfaces and materials, including glass, plastic, metals, and concrete.

One-component PU adhesives can be reactive, amorphous, or crystalline. Bostik’s line of liquid polyurethanes includes high-performance, low-odor construction adhesives that offer fast curing and washing resistance for a durable bond in humid environments. They also provide a wide range of performance features, including good tensile strength, chemical resistance, and flexibility.

There’s no doubt that a strong bond is key when it comes to construction and other heavy-duty applications. A powerful construction adhesive can be the difference between a successful project and a failure. The best construction adhesives are easy to spread and clean up, have a quick bonding time, and can stand up to the elements. The Power Grab Heavy Duty Construction Adhesive from Loctite is all of these things and more.

This heavy-duty construction adhesive and sealant is easy to use and offers a quick 30-second hold time. It provides effective bonding on a wide range of different surfaces, including wood, brick, and concrete. It’s also paintable, has low odor, and is weather-resistant. It’s made for a variety of projects, from small home repairs to large-scale building projects.

High Durability

Unlike silicone, polyurethane does not break down when exposed to ultraviolet rays. It also has a high resistance to impact and vibrations. Polyurethane construction adhesive sealant is a highly durable product that can withstand harsh weather conditions. It is available in a variety of packaging options including cartridge, sausage pack, and drums. It is also easy to apply and clean up. It is available in a wide range of viscosities for different applications.

Polyurethane construction adhesive sealants are a great choice for bonding different materials and sealing joints in structural applications. These products are often used in building construction, polyurethane construction adhesive sealant metal fabrication and masonry projects. They can be used in expansion and control joints, tilt-up walls, metal curtain walls, window and door perimeters, glazing details, and pre-cast panels.

This heavy-duty construction adhesive from Loctite is formulated to provide a strong and long-lasting bond that can withstand any outdoor structural application. It features a 50-year durability rating, which is impressive for an adhesive of this type.

It bonds a variety of materials, including plastics, woods and metals. It also offers superior adhesion to concrete and masonry surfaces. This premium polyurethane construction adhesive is moisture curing, non-sag and provides a flexible and durable seal for exterior gaps and joints. It is available in a wide variety of sizes and is suitable for a number of applications, including commercial, industrial and residential use.

Easy to Apply

A sealant is an essential part of a DIY or Professional toolkit. It’s used to fill gaps in a variety of projects and tasks from sealing around a window to modernising a property. There are many different types of sealants available, so it’s important to select the right one for your needs.

Polyurethane construction adhesive sealant is a good option for many applications because of its easy application properties. These products are easy to spread, clean up quickly and come in a variety of different forms to suit your project. Some are self-levelling, allowing you to achieve an even finish with minimal effort. They also offer a wide range of bonding strengths to accommodate your particular needs.

Some high performance polyurethane adhesive sealants are ideal for harsh industrial environments and can replace rivets, screws, welds and other mechanical fasteners. They are also resistant to weathering, corrosive chemicals and are compatible with a variety of substrates. They also feature a low modulus to allow you to move or adjust materials easily.

If you need a heavy-duty construction adhesive sealant that will stand the test of time, check out this premium one-part, moisture-curing, non-sag elastomeric commercial-grade sealant from Loctite. It provides a durable, waterproof seal for exterior gaps, joints and cracks and can be used in temperatures ranging from -40°C to 194°F.

High Temperature Sealant

High Temperature Sealant

Choosing the right sealant is vital for any job, but it’s especially important when working in extreme temperatures. Silicone sealant stands up to scorching temperatures, repels corrosive chemicals, and maintains its integrity over time.

The fischer high temperature silicone DHS is a durable, one component rubber sealant that cures with atmospheric moisture to form a flexible seal. This material is suitable for sealing, bonding and gasketing applications.

Construction Industry

A silicone sealant is an ideal choice for a construction project because it can withstand high temperatures without losing its shape or integrity. It is also highly water-resistant and can be used in damp areas. This makes it suitable for sealing HVAC systems in homes and commercial buildings, as well as in other applications where temperatures can fluctuate greatly.

During fire testing, the tensile strength and modulus of elasticity of a silicone sealant can be evaluated to determine its reaction to high temperature. The tests can be performed on TA joints or shear samples. The shear test provides a quick alternative to the long TA joint testing process and is a good method for evaluating trends in the performance of a bonding sealant. The results show that silicone sealants can retain a minimum of 75% of their original shear strength after 2 hours of heat exposure at 180 degC.

Another important characteristic of a silicone sealant is its low thermal expansion rate, which prevents it from expanding or contracting in high temperatures. This makes it a popular choice for sealing ductwork, humidifiers, pump and compressor gaskets, and insulating wire and cable. It also adheres to a wide variety of surfaces, including metal, glass, ceramic, plastic, brick and mortar. Moreover, it is easy to use because it does not require mixing and can be applied with standard gun equipment.

Automotive Industry

The automotive industry relies on sealants to ensure that different parts of a car are securely fastened. This includes the sealing of powertrain, fuel and water systems. These sealants need to be durable, strong and flexible at high temperatures. They also need to be able to resist cracking, shrinking and migration caused by thermal cycling. They are also ideally suited for replacing cut gaskets.

These adhesives can also be used in the construction of ductwork, appliance door gaskets, humidifier gaskets and insulating wire and cable. These elastomeric materials can hold up to extreme temperature variations and are resistant to UV radiation, chemicals and moisture. They are also ideal for bonding a variety of surfaces, including glass, tile, metals and woods.

Using high temperature sealant is easy and straightforward. First, make sure that the surface high temperature sealant to be sealed is clean and dry. Next, choose the appropriate product based on the application and the environment. Choose a silicone that has an operating temperature range of -60oF to 500oF and is suitable for use in a wide range of conditions. Before applying, cut the nozzle of the tube at a 45-degree angle. Finally, apply a bead of sealant along the seam to be sealed and smooth it with a tool or damp cloth.

The global market for high-temperature sealants offers significant growth opportunities. A few of the driving factors include growing automobile invention, excessive temperature resistance properties and increasing demand for electric vehicles (EVs). However, business leaders will only have a short window of opportunity to reimagine their core operations.

Oil & Gas Industry

The oil and gas industry faces a range of challenges. Its equipment must be able to endure high temperature sealant harsh chemical environments while maintaining high temperatures. This requires a variety of different materials to be used in seals and coatings.

PTFE and PEEK are common thermoplastics and elastomers that are often used in industrial seals. These materials offer a number of benefits to the industry, including dimensional stability, chemical resistance, and gamma and X-ray radiation resistance. These features make them a great choice for harsh work environments.

Labyrinth seals, slipper and backup rings, and piston rings commonly use PTFE material. Its high elasticity and good chemical resistance also makes it ideal for a variety of oil well applications. Kalrez is another option for seals that must withstand a variety of environmental conditions. This copolymer of tetrafluoroethylene and propylene is highly resistant to abrasion, vibration loosening, steam, hydraulic fluids, and most petroleum products.

Coatings are critical for the oil and gas industry, as they protect equipment from corrosion. They can extend the lifespan of equipment and increase operational efficiency. However, it is important to note that the right lubricant is still needed for the equipment’s specific operating conditions. Using the wrong lubricant can lead to problems such as degradation of seals, which can result in expensive downtime and lost production.

Chemical Industry

The chemical industry uses high temperature sealant as an adhesive to bond and seal a wide variety of surfaces. It can be used in applications where a strong, long-lasting hold is required and in environments where there will be exposure to corrosive or caustic chemicals. High temperature sealant is available in a range of different formulas, each with unique characteristics. Before selecting the right one, it is important to consider the specific requirements of the application. For example, will the sealant be used as an adhesive or a sealant, and will it be exposed to vibration loosening, water or oil leaks, or temperatures above 1000 degrees Fahrenheit?

There are several high-temperature silicone sealants that meet the demands of industrial applications. For example, Deacon 770-L is a thermal-reactive compound that works well as a gasket dressing, thread sealant and metal-to-metal interfaces. This sealant is also formulated to resist the influx of liquids, hydrocarbons and steams and remains flexible in the face of compression loads.

Another option is Permatex’s high-temperature thread sealant, which can withstand extreme conditions without separating or cracking. It can be applied to bare or painted threaded parts and locks tightly, resisting vibration loosening, moisture and hydraulic fluids. It also lubricates threads, allowing for easy disassembly and assembly. It is also non-toxic, water-proof and safe to use around most plastics. It comes in a 10.1-fluid-ounce cartridge with a removable nozzle and cap.

Understanding Construction Adhesives and Sealants

Understanding Construction Adhesives and Sealants

Construction adhesives are used for bonding different materials, such as wood, concrete, metals and more. They create a strong and durable bond that is resistant to water, heat, chemicals, and more.

It is important to choose the right type of adhesive for each job and surface to ensure you get a strong, long-lasting bond.

1. Strength

Construction adhesives and sealants join and bond different materials, offering reliability and structural integrity. Depending on the substrate and environmental conditions, these products can be designed to provide varying levels of strength and durability. The type of stresses — compressive, tensile or torsion — that will be experienced and the working temperature and chemical exposure may influence which adhesives to use.

Adhesives come in several forms, including physically hardened, chemically cured and pressure sensitive. Physically hardened types, which start out in liquid form and dry by evaporation or absorption of the carrier, can include solvent-based adhesives such as cyanoacrylates, silicones or methyl methacrylate and water-based construction adhesives like polyurethanes or epoxy glues.

Generally speaking, caulks are intended to serve a cosmetic purpose, while construction adhesives and sealants sealants will keep air, moisture or other unwanted elements out of a joint. They typically have lower strength than adhesives. On the other hand, construction adhesives can be formulated to meet many specific engineering and production requirements, such as high elongation at break or low shrinkage after application. This enables them to be used in applications that require long-term strength, but short-term handling or rapid production lines.

2. Versatility

A basic understanding of the different types of construction adhesives and sealants enables DIY enthusiasts to make informed choices that improve their results. They can also avoid common mistakes that cause a weak bond.

Whether you are bonding wood, metal, concrete, or plastics, these adhesives offer secure adhesion for projects of all sizes. They can even fill gaps and provide insulation to keep your work stable and structurally sound. They are also able to resist challenging conditions like extreme temperatures and humidity.

These adhesives are available in a variety of containers, including buckets, tubes, and sticks. Some are also formulated for specific materials and applications. To ensure you select the right one for your project, look at its viscosity and other characteristics.

For example, this one-component construction adhesive from Loctite offers the versatility of a strong bond, weather resistance, paintability, and a low VOC count. It is a good choice for large, long-term jobs, or on-the-go use on smaller projects and last-minute fixes. It also comes with UL Environment certification to confirm its eco-friendly properties.

3. Weather Resistance

There are a variety of weather conditions to consider when choosing construction adhesives and sealants. The environment, temperature and humidity are all key factors that impact curing times and long term performance. Choose a high quality product that can stand up to the conditions where it will be used.

Non-structural adhesives are used for bonding decorative materials, floor and wall coverings and other materials that do not need very high strength (panels, fibers and particle boards, trim and some interior doors). These include emulsion, dispersion, silane hybrid prepolymers and solvent-based adhesives.

Sealants are more flexible than adhesives and can fill gaps between components or substrates to form air-tight barriers. They are often used in conjunction with other fasteners and are characterized by high tensile and shear strength. Some sealants are elastomeric, and have up to 40% elongation at break and good construction adhesives and sealants fatigue resistance. Some are low odor, and therefore suitable for use in occupied spaces. They are typically used in the building and construction industry for sealing and caulking.

4. Sealing

Construction adhesives are designed to bond and seal joints in a variety of applications. They’re used to hold materials together and reduce the amount of fasteners needed. They also help distribute load and stress over a larger area, which reduces the chances of failure in high-stress areas.

A wide range of chemistries are available to meet the varied needs of contractors, builders and homeowners. Some of the most common construction sealants are silicones and elastomers that offer versatility and flexibility. Others are based on neoprene or polychloroprene rubber, which offer superior resistance to weathering and aging.

Most of these are one-component sealants that cure through a reaction with humidity in the air. They can be extruded through a caulking gun and used to seal gaps up to 20 mm thickness. These usually contain mineral fillers to reduce cost, improve the gap-filling properties and give a creamy consistency that can be easily spread with a notched trowel without sagging.

5. Protection

Adhesives offer the ability to bond and hold together surfaces in a wide range of applications including flooring installations, stair assemblies, molding and paneling, bathroom installations, and more. This helps to reduce the number of fasteners required and provides greater structural support than fasteners alone.

They form bonds, or stick, in one of two ways: mechanical adhesion, which happens when the fibers and pores of a porous substrate like wood or concrete physically interlock with the adhesive when it dries; and chemical adhesion, which relies on molecular forces, polarity, and surface energy to create a bond between the substrate and the adhesive.

Other considerations when choosing an adhesive include the ambient temperature and humidity where it will be used. High levels of humidity can slow the curing process, and low temperatures can cause the adhesive to become stiff or dry out prematurely. Contractors should also look for products that have been formulated with MoldGuard, which is a special additive that prevents the growth of stain-, odor- and mildew-causing mold and algae on the sealant.

Advantages of Adhesive Silicone

Advantages of Adhesive Silicone

Many industrial workers and do-it-yourselfers use adhesive silicone to bind different surfaces together. This is a strong sealant that is resistant to heat, weathering, moisture and more.

While many silicone adhesives release a corrosive chemical, special formulations are non-corrosive and can be used with electronics. Some can even be formulated to be electrically conductive.


Silicone adhesives are designed to withstand moisture and temperature changes, making them suitable for use in extreme environments. They also have good resistance to ozone, vibrations, and weathering. This durability is an advantage in applications where the bond needs to last long after a product has been placed into service.

The silicone used in the production of these adhesives is derived from natural elements. It is safe for use in the food industry and adheres to a adhesive silicone wide range of materials, including plastics, rubbers, and metals. This makes it a great choice for medical products, such as bandages that create a strong seal and protect against infection but can be removed easily.

Several other features make silicone adhesives an excellent choice for many projects. They are easy to apply and are available in a variety of viscosities. Some are even self-leveling to provide a smooth, consistent finish. Moreover, some silicones are resistant to chemicals and do not release vapors or harmful substances.

It is important to ensure that all surfaces are clean and dry before using the adhesive. This can be done by using a solvent wipe such as isopropanol or acetone. This helps to remove processing lubricants and provides a clean and uniform surface for bonding.


When using adhesive silicones in medical applications, inertness and biocompatibility are key. Silicones are non-toxic and will not react with body fluids, making them a great choice for use around living tissue or in microfluidic applications. They also do not degrade when exposed to high temperatures or harsh sterilization methods. Specialized silicone adhesives provide the versatility required to meet medical product assembly challenges while complying with stringent biocompatibility requirements.

The primary ingredient in silicones is silica, a naturally occurring compound found in sand and stone. Silica makes up one fourth of the earth’s crust and comes in a wide variety of forms such as quartz, tridymite, cristobalite, celestite, keatite, and lechatelierite. Its ability to withstand temperatures, water, weathering, and vibrations make it an excellent choice for bonding metal, glass, ceramic, and plastic substrates.

Adhesive silicones come in a variety of viscosities to meet different application needs. Low-viscosity silicones are ideal for coating substrates and providing a smooth surface while high-viscosity formulations provide higher strength for bonding materials that will be subjected to intense strain.

The curing mechanism of a silicone adhesive is another important factor to consider when choosing the right product for your application. Moisture curing silicones require contact with moisture in the air to initiate the cross-linking reaction and cure. These types of adhesives are suitable for use with many substrates such as dry clean glass, most non-greasy metals, vulcanized silicone rubber, and painted plastic surfaces.


Adhesive silicone does not contain any corrosive chemicals, making it safe to use on materials that are frequently exposed to moisture or the sun. Additionally, it is able to withstand high temperatures without losing its elasticity or bonding strength, which makes it suitable for many different applications.

Silicone adhesives can be used to bond dry clean metal, glass, most non-greasy wood, ceramics, vulcanized silicone rubber, and painted surfaces. They can also be used to seal or protect materials from water, dust, and other contaminants. These types of adhesives do not require any special tools, and they are usually easy to apply and remove.

Depending on the application, silicone adhesives can be either one or two part systems. The ones that are one component cure by absorbing moisture in the air or through UV or EB radiation, while the others need a curing agent to be added and mixed to the glue before applying.

The most common route of exposure for these types of adhesives is dermal, although inhalation and ingestion can occur as well. It is important to make sure that the proper equipment adhesive silicone is used during application to reduce these risks, and workers should be adequately trained in handling these products. This can reduce the amount of hazardous chemicals that are introduced into the environment, and it will help to ensure that these substances do not enter the food chain or water supply.


Unlike most glues that use a chemical reaction to adhere surfaces, silicone adhesives use surface energy to bond with substrates. This means that it can stick to a variety of surfaces including those that other types of adhesives would have trouble adhering to. Surface energy can be measured and some materials have low values that make them difficult for other adhesives to adhere to.

This makes silicone adhesives a great choice for a variety of industrial applications that require materials to withstand harsh conditions. For example, silicones resist weathering and moisture, making them suitable for sealing joints and seams that are exposed to the elements. They also have good electrical properties that can be further enhanced with special formulations to become insulating or conductive.

Other industries that use silicone adhesives include automotive, medical, aerospace, and construction. For example, dental professionals glue prosthetic appliances to the mouth using a flexible and long-lasting silicone adhesive. Since the material is non-chemical reactive, it is safe to use around sensitive areas of the body.

The sustainability of silicone adhesives is further enhanced by the fact that they are not derived from fossil fuels. Unlike acrylic adhesives that are derived from byproducts of the oil industry, silicone adhesives are made from natural ingredients like sand and air. They also emit significantly less volatile organic compounds (VOC) than their acrylic counterparts.

Polyurethane Foam

Polyurethane Foam

Polyurethane Foam is a versatile material that can be used in a wide range of applications. It can be made to have almost any physical property imaginable through the use of additives and chemical reactions.

However, it’s important to understand the health and environmental concerns associated with this popular insulation material. This article will discuss some of the main ones.


Polyurethane foam is a highly durable material that lasts for the entire lifetime of the product it’s contained within. Because of its longevity, it can help reduce fossil fuel consumption and greenhouse gas emissions by replacing disposable materials that need to be replaced frequently. When a consumer disposes of their foam mattress or car seat, the waste typically ends up landfilled or incinerated. If this material is collected and processed in a responsible manner, however, it can be recycled into new, high-quality foam products.

The production of polyurethane foam requires a variety of chemicals, including blowing agents, surfactants, additives, and catalysts. The primary compounds are polyols and diisocyanates, which react to form the polyurethane chain. A blowing agent generates gas to produce the foam’s cellular structure, while surfactants and additives provide additional properties that vary depending on the intended application.

In the past, polyurethane manufacturers used hydrochlorofluorocarbons such as CFC-11 (trichlorofluoromethane) as a blowing agent, but these chemicals were banned by the Montreal Protocol due to their ozone depletion potential. Today, manufacturers use water, pentane, methylene chloride hydrocarbons, and other zero-ozone depletion potential blends to produce polyurethane foam.

Rigid polyurethane foam is often installed in residential homes as insulation for doors, windows, and walls. Its superior thermal insulating qualities result from Polyurethane Foam the combination of its closed-cell foam structure and cell gases, which resist heat transfer. In addition, builders use a similar process to install rigid polyurethane foam in refrigerator and freezer thermal insulation systems.


Polyurethane Foam uses a wide variety of chemicals. This foam is sprayed by trained professionals, who take the necessary safety measures to ensure that they are not exposed to high concentrations of these chemicals. This is because when these liquid chemical components are mixed together, they can release dangerous vapors. This is why workers use protective clothing, masks, and air-driven systems to protect themselves from exposure.

The main chemicals used in the production of polyurethane are amines and isocyanates. These react to make long-chained polymers through a process called polyaddition polymerization, which creates a molecule with alcohol functional groups on one end and isocyanate functional groups on the other. This molecule then further reacts with other isocyanates and polyols to form the polyurethane. The process is made safer through the addition of surfactants and catalysts.

In order to form the cellular structure of the foam, it is treated with blowing agents that generate gas to make it expand and grow in size. Historically, CFC-11 or trichlorofluoromethane was the blowing agent of choice due to its low cost, appropriate boiling point, compatibility with polyurethane, and non-toxicity. However, since the 1987 international agreement to stop ozone depletion led to the ban of CFCs, other blowing agents are now used such as water, pentane, methylene chloride hydrocarbons, and halogen-free azeotropes.

Other auxiliary materials used in the manufacture of polyurethane include chain extenders and cross-linkers. These are low molecular weight hydroxyl and amine terminated compounds that help to control the properties of the polymer by adding functionality. They can be added in various proportions to the polyisocyanate and polyols in order to produce different densities and hardnesses of the polyurethane.

Health & Environmental Concerns

The chemicals used to make polyurethane foam are toxic and can have serious health effects. Exposure to these chemicals can lead to respiratory problems, headaches, skin rash and even cancer. Polyurethane foam can also release dangerous chemicals that cause damage to the environment. These chemicals are also a fire hazard and can pose risks to people and animals when burned. The flame retardant HBCD released by the foam can affect the survival and reproductive health of fish and algae. It can also harm the liver enzymes of birds and a variety of other animals.

Foam manufacturing plants often produce harmful vapors, aerosols and dusts. Workers need to wear chemical resistant gloves and eye protection. The Occupational Safety and Health Administration has safety guidelines for working with polyurethane. Workers should avoid cutting or trimming the foam until it has cured. Attempting to do this will generate dust that may contain unreacted isocyanates and other chemicals.

While polyurethane is not as environmentally friendly as some other materials, it does have one of the best recycling records in the industry. This is largely due to the fact that it can be recycled into the exact same product that it was originally made for. In addition, it does not require the use of new raw materials when recycled. This helps to limit waste in production.


Polyurethane foam is found in many different applications in our everyday lives. Its flexibility, resilience, durability and insulating characteristics are just some of the reasons it is used in such a variety of products. In our homes, flexible foam padding cushions carpeting, while reflective plastic coverings over rigid polyurethane foam in roofing can bounce sunlight and heat away from the house, keeping it cooler and cutting energy costs.

Rigid polyurethane foam is commonly installed in doors and garages to insulate them, as well as in walk-in refrigerators and SIPS (Structural Insulated Panels). It’s also commonly used to insulate appliances such as hot water heaters and ice machines.

The cellular structure of polyurethane foam is created by using blowing agents that generate gas to expand and create the foam. The first blowing agents were hydrochlorofluorocarbons such as CFC-11 and trichlorofluoromethane, which are now being Polyurethane Foam replaced with water, pentane, methylene chloride hydrocarbons, halogen free azeotropes and other zero ozone depletion potential blends.

The sprayed polyurethane foam is generally bonded to a nonwoven substrate or netting, or to a fabric. This is typically done through a process such as flame bonding, hot film or powder adhesive. The sprayed polyurethane foam has excellent resistance to atmospheric conditions such as rain, extreme temperatures and wind. It’s only attacked over time by long-term exposure to sunlight, which causes a dusty appearance on the surface of the foam.