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CRC Metallic Block Seal 401016 - 16 oz - Pack of 1
Permanent molecular seal that’s as strong as steel
Seals cracks & holes in cast iron and aluminum engine blocks, head gaskets, freeze plugs, and copper, aluminum and bi-material radiators & heater cores
For use in all water-cooled diesel and gasoline vehicles
Withstands extreme pressure and temperatures of a cooling system and will not wash away
Professional grade formula exceeds ASTM D6107 for effectively sealing leaks in cooling systems
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