Tough and Flexible to Form Strong Bonds Forming watertight seals, 3M Marine Adhesive Sealant 5200 offers permanent adhesion to wood, gel-coat and fiberglass. In addition, our marine adhesive sealant is flexible and allows for structural movement and dissipation of stress that may be caused by vibration, swelling, shrinking or shock. Recommended Applications - Fiberglass deck to hull -Through hull fittings - Wood to fiberglass - Portholes and deck fittings -Motors on fiberglass transoms - Under moldings -Hull seams above and below water line -Deck housing Combats Vibrations, Swelling, Shrinking and Shock 3M Marine Adhesive Sealant 5200 is designed to meet the high demands of the marine environment, making it ideal for creating tough bonds resistant to saltwater and weathering. We formulated our sealant to provide an exceptionally strong solution for marine conditions as well as flexibility that combats vibrations, swelling, shrinking or shock. Once again, despite the barriers of a rough marine environment, 3M looked to science to provide a reliable, durable solution. Designed to Endure Marine Environments 3M Marine Adhesive Sealant 5200 is a part of our broad range of adhesive sealants uniquely formulated for the marine market. Understanding Polyurethane Sealants Polyurethane sealants provide strong, flexible durable elastomeric bonds that seal against the elements. These sealants excel in challenging industrial, transportation and construction applications.