3M™ Polyurethane Sealant 540

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), and Replacement of mechanical fasteners in many situations.


  • 310 mL Cartridge
  • 600 mL Sausage
  • 5 gal drum (pail)
  • 55 gal drum

Available Colors

  • White
  • Grey
  • Black
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