3M Marine Adhesive Sealant 5200 White 10 oz Polyurethane Boat Sealant

3M™ Marine Adhesive Sealant 5200 White 10 oz. is a one-part, high-strength polyurethane adhesive and sealant designed for permanent bonding in marine environments. It cures with moisture to create a durable, flexible, and waterproof seal, making it ideal for bonding wood, gelcoat, and fiberglass. Suitable for use both above and below the waterline, this sealant accommodates structural movement and absorbs stress from vibration, swelling, shrinking, or shock. Available in cartridge and sausage packs to suit your application needs.

• Permanent, high-strength bonding
• Waterproof and flexible seal
• Ideal for wood, gelcoat, and fiberglass
• Use above and below the waterline
• Absorbs vibration and structural movement

Suggested Applications:

• Fiberglass deck to hull
• Through-hull fittings
• Wood to fiberglass
• Portholes and deck fittings

Safety data sheet SDS