Tenacious bonds and watertight seals above or below waterlineProvides 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. Formulation: One-part polyurethane adhesive/sealant Recommended Usage: Permanent bonding, above and below water. Extremely strong & flexible Material Incompatibilities: Plastics (ABS, Lexan) Cure Time: Tack free: 48 hrs; complete cure: 5-7 days; moisture activated cure Clean Up: Mineral spirits or kerosene Removal: Mechanical removal Tensile strength: 700psi