All gaskets perform the same task regardless of the
composition of material; their main functions are to mate and
seal surfaces, and prevent liquids, dirt, gases, and
other contaminants from entering the unit. Another purpose they
serve is to maintain your oil capacity and keep it free from leaks,
therefore it's best to have a complete set of gaskets to ensure
proper seal and pressure. Compressor gaskets come in numerous forms
and can be made from cork, plastic shim material, treated
paper, Vellumoid 505 Fiber®, and the most
widely used being Klingersil®.