Permanently fixes blown Head gaskets ... they will seal leaks up to 0.635mm in size These micro-fibres will naturally migrate to the pressure differential caused by the coolant Leak or failure ...

Head gasket sealer can get out out of a jam until you can replace the gasket. Photo credit: David Traver Adolphus / Au ...

If the leak is small, the coolant could evaporate as it leaks, making the symptom a bit challenging to spot. Meanwhile, a breach in the head gasket between an oil gallery will cause noticeable ...