ST5516 K Seal® Heavy Duty Permanent Coolant Leak Sealer

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One step, just pour and go

Seals head gasket leaks, radiators, engine blocks, water pumps, etc.

A repair made with K-Seal HD is permanent, guaranteed for the lifetime of the engine

Unlike inferior coolant products, K-Seal HD mixes with all types of antifreeze and coolant, there’s no need to drain or flush the system before or after treatment

Pour into radiator and let engine run for a few minutes.

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