Product Data Sheet

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.

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

Product Features

• One component (moisture cure) has no mixing and simplifies production
• Bonds dissimilar materials for design flexibility
• Adheres to wide variety of substrates
• Permanently elastic
• Paintable after cure to improve product finish
• High tensile strength for fastener replacement
• Low modulus/shore A hardness designed for sealing and materials having mismatched thermal expansion