J-B Weld 8272 Dark Grey 3-Pack J-B MarineWeld is a specially formulated two-part epoxy cold weld system Provides for strong, lasting repairs for bonding different or similar surfaces, such as aluminum, metal, composites, fiberglass and others MarineWeld sets in 4-6 hours 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 and will retain its strength above or below the waters' surface Great for boats, personal watercraft, in/outboard engines and deck & hull accessories