3M Polyurethane Sealant 540, Gray, 600 mL Sausage Pack, 12/Case

• EASY TO USE: Single component, moisture-curing sealant fills gaps and simplifies production
• FLEXIBLE BONDS: Maintains elasticity for shock absorption and long-term joint movement
• MULTI-PURPOSE BONDING: Forms long lasting seals dissimilar materials such as plastics, fiberglass reinforced plastic (FRP), sheet molding compound (SMC), aluminum, steel, coated metal and wood for increased design flexibility
• PAINTABLE IN MINUTES: Forms a skin in 60-90 minutes that can be painted on once the sealant is fully cured
• Weather Resistant: A distinct ability to excel in challenging outdoor industrial, transportation, and construction environments between -40 °F (-40 °C) and 194 °F (90 °C)”

3M Polyurethane Adhesive Sealant 540 is a moisture-curing sealant that forms flexible, weather-resistant bonds. This single-component adhesive bonds dissimilar materials including plastics, sheet molding compound, aluminum, steel, coated metal, and wood in temperatures ranging from 40 °F (40 °C) to 194 °F (90 °C). Polyurethane sealants perform well in challenging industrial, transportation, and construction settings by creating durable elastomeric bonds that seal against the elements. High tensile strength, weather-resistance, and low hardness allow 3M Polyurethane Adhesive Sealant 540 to excel in applications such as exterior panel bonding, retail storefronts, and transportation manufacturing.

Multi Purpose Sealant with Good UV Resistance
3M Polyurethane Sealant 540 is a single component, moisture curing, polyurethane sealant used to bond a wide variety of materials, including plastics, fiberglass reinforced plastic (FRP), sheet molding compound (SMC), aluminum, steel, coated metal and wood. It exhibits high tensile strength, good UV resistance, low Shore A hardness and low modulus to maintain its functionality in a wide range of extreme service environments. Available in cartridge, sausage pack, pail and drum volumes to meet your application needs.

Recommended Applications

• Vertical and horizontal panel bonding and joint sealing
• Aluminum curtain walls and storefronts
• Transportation manufacturing (bus, rail, truck, trailer)
• Replacement of mechanical fasteners in many situations

Paintable after Skin Forms for Improved Appearance
3M Polyurethane Sealant 540 offers an alternative to mechanical fasteners and can replace rivets in some applications. It will bond dissimilar substrates and a wide selection of materials. This will perform in temperatures ranging from 40°F/ 40°C to 194°F/90°C. Once skin forms (60 90 minutes), the sealant can be painted to improve the final finish.

Understanding Polyurethane Sealants
Polyurethane sealants provide strong, flexible durable elastomeric bonds that seal against the elements. These sealants excel in challenging industrial, transportation and construction applications. Polyurethane sealants are available in a wide variety of Shore A hardness, open time and colors to meet many application needs. Choose a 3M Manual or Pneumatic Applicator for dispensing 3M adhesives sealant cartridges and 400ml/600ml sausage packs.

Bringing Better Ideas to the Surface through Science and Innovation
In our 3M Industrial Adhesives and Tapes Division, we apply the science of adhesion to deliver innovative solutions that improve the design and manufacturing processes of companies around the world. In the end, our technologies help customers like you deliver competitive products to the market faster and more efficiently.

3M Polyurethane Sealant Benefits

The 3M Polyurethane Sealant 540 is a single-component, moisture-curing sealant designed for easy use. Its gray color and 600 mL sausage pack format make it convenient for various applications. This sealant simplifies production by filling gaps effectively while maintaining strong adhesion.

Its 12/case pack count ensures you have enough product for multiple projects. The 3M brand guarantees quality and reliability, making this sealant a trusted choice for industrial and construction needs.

Flexible Bonds For Durability

This sealant maintains elasticity to absorb shocks and accommodate long-term joint movement. The polyurethane formula ensures flexible bonds that withstand stress without cracking or losing adhesion.

Ideal for exterior panel bonding and retail storefronts, the 3M Polyurethane Sealant 540’s flexibility supports durable seals on various surfaces, including metals and plastics, enhancing overall durability.

Multi-Purpose Material Compatibility

The 3M Polyurethane Sealant 540 bonds dissimilar materials such as plastics, fiberglass reinforced plastic (FRP), sheet molding compound (SMC), aluminum, steel, coated metal, and wood. This versatility allows for increased design flexibility across many industries.

Its ability to form long-lasting seals on these diverse materials makes it suitable for transportation manufacturing, curtain walls, and joint sealing, providing a reliable alternative to mechanical fasteners.

Paintable Sealant For Appearance

This sealant forms a skin in 60-90 minutes, allowing it to be painted once fully cured. The gray color blends well with many surfaces, and the paintable feature improves the final appearance of bonded joints.

Paintability after skin formation makes it ideal for applications where aesthetics matter, such as storefronts and exterior panels, offering a clean, finished look without compromising seal integrity.

Weather Resistant Temperature Range

The 3M Polyurethane Sealant 540 performs well in temperatures from -40 °F (-40 °C) to 194 °F (90 °C). This weather resistance ensures reliable sealing in harsh outdoor industrial, transportation, and construction environments.

Its durability in extreme temperatures protects joints and panels from environmental damage, making it a dependable choice for long-term sealing needs in challenging conditions.