3M 5200 Fast Cure Polyurethane Adhesive/Sealant, 1oz Tube

Provides exceptionally strong adhesion, yet stays flexible after it cures; may be used above or below the waterline. Ideal for underwater thru-hull fittings, hull-to-deck joints, portholes and bonding wood to fiberglass. Goes on smoothly, won’t sag, and remains workable up to four hours. Cures in 5–7 days with no shrinking. 1oz size is perfect for that one to time use without hardening in the tube.