3M Marine Adhesive Sealant is a one-component, high-strength, moisture-curing, gap-filling polyurethane for permanent bonding of wood, gelcoat and fiberglass. It cures to form a firm, rubbery, waterproof seal on joints and boat hardware, above and below the waterline. Ideal for through-hull and deck fittings and deck to hull joints.
Permanent bonding above and below the waterline
Tough and flexible polyurethane polymer forms strong bonds
Capable of retaining strong bonds during vibration, swelling, shrinking or shock
Fast-cure version of 3M marine adhesive sealant 5200
Tack-free in 1-2 hours and typically cures within 48 hours