3M Polyurethane Adhesive Sealant 540 is an all-purpose, single-component, moisture-curing, gap-filling polyurethane adhesive that creates permanently elastic seals and bonds in a wide variety of service environments. 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.  Features:

• Multi-purpose bonding and long lasting seals
• Permanently elastic to allow joint movement
• 60-90 skin time; paintable, once skin forms
• Good UV resistance
• One component, moisture-curing sealant simplifies production
• Bonds dissimilar materials for increased design flexibility
• Gap filling capability