3oz 5200 White Marine Adhesive/Sealant - Polyurethane sealer. Tack free in 48 hours. Cures in 5-7 days with no shrinkage. Extremely strong above or below waterline. Stays flexible. Bonds and seals fiberglass deck to fiberglass hull, wood to fiberglass. Easy to apply with manual caulking gun. Workable up to 4 hours after application. Will not sag or flow in vertical or horizontal seams. The seal is extremely strong, retains its strength above or below water line. Stays flexible too - allows for structural movement. Has excellent resistance to weathering and salt water. Stress caused by shock, vibration, swelling or shrinking is effectively absorbed. Check the bonding and sealing jobs this product can handle for you; fiberglass deck to fiberglass hull, wood fiberglass, portholes and deck fittings, motors on fiberglass transoms, under moldings, hull seams above and below water line. Between struts and planking. Stern joints. Deck. White in color. 3oz tube. 1 per package.