Product Overview
3M 5200 Marine Sealant (Black)
Conquer leaks and secure your vessel permanently with 3M™ Marine Adhesive Sealant 5200 (Black). This powerful, multi-purpose sealant provides a superior, weather-resistant bond for a wide range of marine substrates, including wood, fiberglass, and metal. Its tough yet flexible polyurethane formula resists saltwater and weathering above and below the waterline, while effectively absorbing stress from vibration, swelling, and shrinking for lasting performance. Ideal for demanding applications such as deck fittings, portholes, and hull seams, 3M™ 5200 ensures watertight seals that endure the harshest marine environments.
Key Features
- Powerful marine sealant
- Permanent solution for bonding marine substrates
- Resists saltwater and weathering
- Flexible bonds that absorb stress
- Long working time (up to 4 days to fully cure)
- Ideal for use above and below the waterline
- Bonds dissimilar materials (wood, fiberglass, gelcoat, plastics, and metals)
Specifications
- Material: Polyurethane
- Application Type: Marine
- Adhesion Strength: High-strength
- Water Resistance: Resists saltwater and weathering above and below the waterline
- Flexibility: Forms permanently flexible, elastomeric bonds
- Working Time: Long working time, handling strength in 48 hours, full cure in up to 4 days
- Recommended Applications: Fiberglass deck to hull, through hull fittings, wood to fiberglass, portholes and deck fittings, motors on fiberglass transoms, under moldings, hull seams above and below water line, deck housing
The Captain's Take
3M 5200 black sealant is a workhorse, providing superior strength and a lasting, tough-as-nails seal for critical marine applications where failure isn't an option. Its permanent bond justifies the investment despite varying online pricing, but careful planning and preparation are crucial before application; a poorly executed 5200 job is exceptionally difficult to rectify. Consult a reputable marine supply house for expert advice if needed.
