K&W 401016 Permanent Metallic Block Seal, 16 oz

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.

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Permanent molecular seal that's as strong as steel Seals cracks & holes in cast iron and aluminum engine blocks, head gaskets, freeze plugs, and

CRC K&W 401016 Block Seal Permanent Metallic™ Block & Radiator Seal - 16 Oz

KW-401016 BLOCK SEAL PERMANENT METALLIC BLOCK & RADIATOR SEAL 16 WT. OZ. 1LB 454G K&W