Fills holes and cracks to any size or depth. Nonconductive, may be used as bedding compound for electrical. Use to treat dry rot areas and repair gutters, steps, sundecks, porches, concrete floors and walls, tanks, window sills, garden pools, fuel tanks,cracked toilets and basins. 15 minutes work time. Bonds permanently to metal, plastic, wood, tile, concrete, etc. Impervious to gas, oil, brine and alkaline cleaners. Shelf life virtually forever. Cures even underwater. Remains flexible and can be sawed,drilled, tapped, sanded, and painted.