Stops leaks safely, quickly, and easily. Compatible with all antifreeze and coolants. Safe for all metal, plastic, and rubber cooling system parts. On a card.

Mixture of seven organic ingredients designed to permanently seal holes and cracks in radiators, water jackets, and cylinder heads. Just pour into the radiator while the engine is running, it seeks out holes, and swells shut as soon as it comes in contact with air. Will not re-dissolve, and draining or flushing will not affect the seal. On a card.

Seals even large leaks without interfering with the flow through the radiator and heater core tubes.

Circulates through the cooling system., Seals leaks, stops head gasket and combustion chamber seepage, prevents rust and lime from forming. In a plastic bottle.

Stops leaks safely, quickly, and easily. Compatible with all antifreeze and coolants. Safe for all metal, plastic, and rubber cooling system parts.

Sprayable sealer that forms a rubber barrier to stop leaks. Wicking action seals hard-to-reach leaks without the need for disassembling or removing parts. Designed for low pressure leaks in hoses, oil pans, differentials, transmission pans, fluid reservoirs and plastic, PVC and metal pipes.