Repair manifolds, outdrives and trimtabs, exhaust lines, fuel and water tanks and lines. Patch fish boxes, ice chests, battery cases and buckets. Seal leaks. Insulate electrical connections. Form gaskets. Cures underwater! Sets in 30 minutes. Can be sanded, painted, drilled, tapped and filed. Will not shrink or pull away. Resealable tube prevents dry out after opening.