Exhaust Gaskets also comes in
various types of materials like Asbestos, Non-Asbestos with or
without Heat shields in ASA material, SAS material and MLS (Steel
Laminated) materials.
In case of Inlet manifolds these comes in soft asbestos / Asbestos

Valve cover gaskets are made of a variety of materials, including synthetic rubber, cork rubber or molded rubber. Cork rubber is the most common material used on older engines, and molded rubber is most popular on today’s engines. The latest innovation in valve cover gaskets is the rigid carrier with a molded-silicone

The bottom of the crankcase in an internal-combustion engine, serving as an oil reservoir which is basically used for sealing the lower part of the engine to prevent Leakage
These Gaskets are manufactured in Rubber, Cork, CAF, Non-Asbestos and Oil Resistant Sellolus Jointing material. In rubber there material specification

An O-ring/thermostat, also known as a packing, or a toric joint, is a mechanical gasket in the shape of a torus or it is a loop of elastomer with a disc-shaped cross-section, designed to be seated in a groove and compressed during assembly between two or more parts, creating a seal at the interface.
The O-ring may be used in

A valve stem seal and lubricator for an internal combustion engine intake or exhaust valve comprising a capillary member surrounding and slidably engaging the valve stem. The capillary member is enclosed and retained by a seal or scraper member positioned over and about the valve guide boss. The seal member has an orifice which