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.

Bonds dissimilar materials for increased design flexibility

Good UV resistance

Permanently elastic to allow 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

FLEXIBLE BONDS, Maintains elasticity for shock absorption and long-term joint movement

PAINTABLE IN MINUTES, Forms a skin in 60-90 min 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 deg F (-40 deg C) and 194 deg F (90 deg C)

EASY TO USE, Single component, moisture-curing sealant fills gaps and simplifies production