3M Marine Adhesive Sealant 4200 White 3 oz – Fast Cure Waterproof Polyurethane for Boat Repair

3M™ Marine Adhesive/Sealant 4200, White - 3 oz. (MMM05260)

3M™ Marine Adhesive Sealant Fast Cure 4200FC is a one-component, medium-strength, moisture-curing polyurethane sealant designed for marine environments. It provides strong, flexible bonds to aluminum, wood, gelcoat, and fiberglass, forming watertight and weather-resistant seals both above and below the waterline.

• Medium strength bonding allows for future disassembly
• Fast curing formula delivers rapid results
• Tack-free in 1 hour; typically cures within 24 hours
• Suitable for use above and below the waterline
• Flexible and durable adhesion withstands stress, shock, and vibration
• Gap-filling polyurethane adapts to swelling or shrinking

This versatile marine sealant chemically reacts with moisture to create flexible bonds with excellent adhesion to wood, fiberglass, gelcoat, plastics, and metals. It is ideal for bonding dissimilar materials and forms a permanent, elastic seal that allows for disassembly after prolonged use.

Recommended Applications:

• Fiberglass deck to hull bonding
• Wood to fiberglass joints
• Portholes and deck fittings
• Rubrail attachment
• Sealing screw holes
• Stanchion supports

Safety data sheet SDS