Permanently fixes blown Head gaskets, cracked heads and porous engine block One bottle ... micro-fibres in K-Seal Ultimate are carefully produced so that they will seal leaks up to 0.635mm in ...

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

Head gasket sealer can ... heads and the cylinder block, it’s a fairly vital part that doesn’t need too much attention until there is a crack, which can cause some leaking.