Permanent Metallic Block Seal Head Gasket Repair, 16 oz Can, 12 per Case CRC401016 CRC Industries

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