3M Polyurethane Adhesive Sealant 551 is a long open time polyurethane designed to cosmetically seal and bond a variety of applications. Used extensively for marine and specialty vehicle markets, it is designed for more complex application requiring time extended time for alignment. It provides excellent adhesion to concrete, wood, aluminum, most lacquered metals, polyester, glass and stone. Good for both above and below water line in marine applications. Once dry, adhesive surface can be painted.