Ceramic Cooling System Sealant

* The best Chemical Sealer you can buy to stop cooling system leaks* Works equally well in aluminum or cast iron blocks* Cooling system must be thoroughly clean before use* Does not work with antifreeze* If this doesn't stop the leaks find yourself a welder! Stop cooling leaks with the best chemical sealer you can buy. This Moroso Ceramic Engine Seal works equally well in aluminum or cast iron blocks. For best results thoroughly clean the cooling system before use. Not compatible with antifreeze.