3M Fast Cure 5200 creates an extremely high-strength, watertight seal above and below the waterline.If you are looking for a bedding compound with exceptionally strong adhesion, and are not concerned about later removal of hardware, 3M Fast Cure 5200 should be at the top of your list. Along with outstanding adhesion, 3M Fast Cure 5200 remains flexible after it cures and it can be used above or below thewaterline. Ideal for underwater thru-hull fittings, hull-to-deck joints, portholes and bonding wood tofiberglass.Key FeaturesIdeal for bedding hull-to-deck joints or other long-term applicationsStrong, flexible adhesive for virtually permanent bonding and sealing above and below waterlineAdhesive bonds and seals fiberglass deck to hull, wood to fiberglassChemically reacts with moisture to deliver strong, flexible bondsForms watertight, weather-resistant seals on joints and boat hardware