3M 5200 Polyurethane Fast Cure Adhesive-Sealant 3M 5200 Polyurethane Fast Cure Adhesive Sealant is a one-component sealant designed to meet the high demands of the marine environment. 5200 Fast Cure provides strong watertight bonds and has permanent adhesion to wood, gelcoat, and fiberglass. 3M designed this sealant to be flexible, it allows for structural movement and dissipation of stress that may be caused by vibration, swelling, shrinking or shock. 5200 Fast Cure Sealant creates tough bonds