K&W Metallic Block Seal 16oz

Forms a permanent molecular bond that's as strong as steel. Seals cracks and holes in cast iron and aluminum engine blocks, head gaskets, freeze plugs, and copper, aluminum and bi-material radiators and heater cores.

• *Extends the life of your vehicle
• *Rated no. 1, tested by an independent test lab
• *Repairs gaskets
• *Seals cracks
• *Stops leaks