CRC 401016 Metallic Block Seal-16 Oz. Can, 16. Fluid_Ounces,

CRC 05371 Copper Block Weld Permanent Block & Radiator Sealer -16 Fl Oz

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The Copper Block Weld permanently repairs cracks in iron and aluminum heads, radiators and freeze plugs using a copper ceramic sealing system.

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Product Review

The Copper Block Weld permanently repairs cracks in iron and aluminum heads, radiators and freeze plugs using a copper ceramic sealing system.

This modified liquid glass formula.
Formulated with copper.
Permanently seals cracks and holes in aluminum and iron engine blocks and cylinder heads, all metal and plastic radiators, head gaskets, water pumps, and freeze plugs.
Permanent block and radiator sealer

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CRC 401016 Metallic Block Seal-16 Oz. Can, 16. Fluid_Ounces,