3M Marine Adhesive Sealant 3 oz

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.