MLS Gasket Archives - UnderhoodService
The Evolution Of MLS Gaskets

In 1970, Japanese gasket maker Ishikawa received the first patent for the multi-layer steel (MLS) head gasket. The first production vehicle to use an MLS gasket was a tiny Isuzu car in Japan.

MLS Gasket Update

The days of getting away with composition gaskets in extreme combustion situations were back when the deck surfaces on blocks and heads were thick and strong, and the heads were clamped with 5-6 head bolts per cylinder. However, all that changed when car makers became extremely weight conscious for MPG reasons and they started removing material out of blocks and heads.