Head Gasket / Block Sealer

Seals small head gasket and block leaks by circulating with coolant and depositing sealant at leak locations.

Head Gasket/Block Sealer is a specialty chemical additive designed to address small internal or external coolant leaks caused by minor head gasket seepage or hairline cracks in the engine block. It circulates with the coolant and deposits a seal at leak sites. This product is intended only for small, slow leaks and cannot repair major gasket failure or structural damage requiring full replacement.

⚠️ Owners Often Notice

If the Head Gasket / Block Sealer is starting to fail, these are the signs owners most commonly report before it gets worse:

Related Services

Services commonly performed on or around this part.