Forms a permanent molecular bond that's as strong as steel. Seals cracks & holes in cast iron & aluminum engine blocks, head gaskets, freeze plugs, & copper, aluminum & bi-material radiators & heater cores. Tested by an Independent test lab. Rated No.1
- Notes: Can be used on a boat engine if it is water cooled.
- Applications: Aluminum engine blocks, cooling systems, cylinder heads, engine blocks, freeze plugs, head gaskets, heaters cores, iron engine blocks, metal radiators, plastic radiators, radiators, water pumps