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Answers from the Automotive Experts

Jo An Holt, Automotive Journalist at Holt & Associates The short answer is NO.

Karen Salvaggio, Owner - Professional Race Car Driver at Thunder Valley Racing The simplle answer is, no. Coolant additives are meant to seal small cracks in a car's radiator. They may work for a brief amount of time in a car with a blown head gasket, but will soon leak again due to the extreme pressures bleeding from the cylinders into the water system.

Stephanie Gutierrez, Marketing at Victory Auto Service & Glass The short answer is no, they do not. Head gaskets typically consist of materials like copper, steel, graphite and polymer coatings. When a head gasket fails it is due to deterioration of these components which creates a sealing void that no liquid sealant can replace.

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