3M 05280 4000UV Fast Cure Sealant, White, 3 oz. Tube

A one part sealant that cures to form a firm, rubbery waterproof seal. Its flexibility allows for the dissipation of stress caused by shock, vibration, swelling or shrinking. Use above or below the waterline. Superior UV resistance properties. Tack free in less than 2 hours, cures in 24 hours.