3M Polyurethane Sealant 540, Gray, 310 mL Cartridge, 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.

Trusted 3M Polyurethane Sealant

The 3M Polyurethane Sealant 540 is a reliable choice for sealing and bonding needs. This gray sealant comes in a 310 mL cartridge, making it easy to handle and apply. Its single-component, moisture-curing formula simplifies production by filling gaps efficiently.

Designed for durability, this sealant maintains elasticity to absorb shocks and accommodate joint movement. The 12 per case pack size ensures you have enough supply for multiple projects or larger jobs.

Flexible Bonds For Durability

This sealant keeps its flexibility over time, which is crucial for joints that experience movement or vibration. The 3M Polyurethane Sealant 540 forms strong, elastic bonds that help protect against damage and wear.

Its ability to bond dissimilar materials like plastics, aluminum, and steel makes it versatile for many applications. The 310 mL cartridge format fits standard applicators, allowing precise and controlled application.

Multi-Purpose Material Compatibility

3M Polyurethane Sealant 540 bonds a wide range of materials including fiberglass reinforced plastic, sheet molding compound, coated metal, and wood. This flexibility supports diverse design needs and construction requirements.

Its performance in temperatures from -40 °F to 194 °F suits outdoor and industrial environments. The gray color blends well with many surfaces, enhancing the finished appearance of your projects.

Paintable Sealant For Appearance

Once applied, the sealant forms a skin within 60 to 90 minutes, allowing it to be painted after full curing. This feature improves the final look of bonded surfaces, making it ideal for visible joints and panels.

The 3M Polyurethane Sealant 540’s paintability adds value in applications like storefronts and exterior panel bonding. Its 310 mL cartridge size supports efficient use without waste.

Weather Resistant Industrial Strength

Built to withstand harsh conditions, this sealant excels in transportation, construction, and industrial settings. It resists weather extremes from -40 °F to 194 °F, ensuring long-lasting seals.

The 12/Case packaging provides enough product for multiple uses, making it practical for large-scale projects. Its high tensile strength and low hardness balance durability with flexibility.