3M 5200 SEALANT FAST CURE, WHITE 3 OZ
For thru-hull fittings above and below the water line 3 oz tube. Watertight bonding sealing of fiberglass and wood. Ideal for thru-hull and deck fittings and deck to hull joints. Flexible fully cures in 20-24 hours.
Use for struts, rudders, tracking fins, and exhaust thru-hull fittings.
Test fitting your parts before applying helps, the Fast Cure is semi-bonding.