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. Multi-Purpose Sealant with Good UV Resistance.
Common Characteristics
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.
Gap filling capability. 60-90 skin time; paintable, once skin forms.