5200 Fast Cure - Marine Adhesive Sealant

High-Strength Marine Sealant for Above and Below Waterline Applications

The 5200 marine sealant delivers superior waterproof sealing performance for critical boat applications both above and below the waterline. This professional-grade marine adhesive creates an extremely strong, watertight seal that maintains flexibility after curing, making it the ideal choice for demanding marine environments.

This is a faster curing version of the "industry standard" 3M™ Marine Adhesive/Sealant 5200.
3M 5200 Fast Cure forms an extremely strong seal which retains its strength above or below the water line. Use for structural bonding of wood, fiberglass, gelcoat, primed metal. Only available in white.

Superior Adhesion and Flexibility for Marine Applications

This advanced marine sealant provides exceptional bonding strength while remaining flexible throughout its lifespan. The unique formulation ensures reliable performance in underwater applications, including thru-hull fittings, hull-to-deck joints, and porthole installations. The versatile adhesive excels at bonding wood to fiberglass and other marine materials.

Easy Application with Extended Working Time

The smooth application process eliminates sagging and provides up to four hours of working time for precise installation. The marine sealant cures completely in 5-7 days without shrinking, ensuring a permanent, reliable seal that withstands harsh marine conditions.

• Tack-free: 60 min
• Tensile strength: 1,000 psi
• Shore A hardness: 60
• Elongation: 850%
• Overlap shear strength for gelcoat (70°F): 600 psi
• Non-shrinking, non-sagging
• Stays flexible, allowing for some structural movement
• Use above or below the waterline
• Excellent resistance to weathering and salt water
• Absorbs stress caused by shock, vibration, swelling or shrinking
• Best used when no removal is anticipated