3M 5200 Marine Sealant Fast Cure White Available for delivery 5200 creates an extremely high-strength, watertight seal above and below the waterline. 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 fibreglass. Goes on smoothly, won’t sag, and remains workable for up to four hours. Cures in 5–7 days with no shrinking. Key features Ideal for bedding hull-to-deck joints or other long-term applications Strong, flexible adhesive for virtually permanent bonding and sealing above and below the waterline Adhesive bonds and seals fibreglass deck to hull, wood to fibreglass Chemically reacts with moisture to deliver strong, flexible bonds Forms watertight, weather-resistant seals on joints and boat hardware