Description MarineWeld is a specially formulated two-part Cold-Weld adhesive system that provides strong, lasting repairs for bonding different or similar surfaces, such as metal, composites, fiberglass, and others. MarineWeld sets in 20 minutes at room temperature and is fully cured to a dark grey color in 15-24 hours. Once cured, it can be shaped, tapped, filed, sanded and drilled, retaining full strength above or below the waters' surface. MarineWeld has a 1:1 mixing ratio and tensile strength of 5020 PSI.