3M Marine Adhesive Sealant Fast Cure 5200 is a fast-curing version of long-trusted 3M Marine Adhesive Sealant 5200. It is a tough, flexible polyurethane for permanent bonding and sealing, ideal for use on wood, gelcoat, fiberglass, metal and more. It is recommended for interiors, below the waterline and any other places that are shielded from sunlight. Instead of 5-7 days, it typically cures in just 48 hours. Everything else is the same as the industry standard 5200 adhesive sealant that has been used and trusted for more than 50 years by marine professionals in some of the most demanding conditions on earth. It applies right from the container – no mixing is required - and cures to form a firm, flexible, waterproof seal on joints and boat hardware. Far more than a marine caulk, tough, flexible 3M Marine Adhesive Sealant 5200FC dissipates stress caused by vibration and shock and won’t crack under dynamic force. It resists saltwater, wind, weather and temperature extremes for long periods of worry-free enjoyment on the water.