Our team narrowed down the best radiator stop leaks on the market Read this review and save yourself time and money. Get the scoop on the best radiator stop leak additives We've got reviews and a simple guide to help you pick the right one Easy solutions for a cool ride! Even the best radiator stop leaks aren’t quite as essential as oil, transmission, and brake fluid, but should be a part of anyone’s automotive maintenance kit.
A car radiator stop leak is an additive designed to seal minor leaks in the radiator and the cooling system It works by suspending small particles that bond with coolant to form a temporary seal at leak points.
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