Plain Steel Core Cylinder Head Gaskets
As the name suggests these consist of aramid fibre facings bonded to a tinplated or zinc coated steel core. The adhesive used is resistant to oils, fuels & coolants. The strength of the material makes an ideal medium for sealing engines with narrow bore bridges.
Perforated Steel Core Cylinder Head Gaskets
These are composites with a perforated and tanged steel core with aramid fibre facings and provide a mechanical bond between the facings and core for improved durability.
An adhesive can also be used to bond the facings and prevent coolant leakage along the core line. This construction is used for medium to heavy duty cylinder gaskets as well as for smaller engines.