On a very general level a gasket might be defined as a flexible component that sits in-between two other surfaces. Gaskets are commonly made of a flexible material such as rubber, paper, or cork. In fact, there are many different materials that gaskets can be made out of, and so gaskets cannot simply be defined by means of the material that they are made out of. Gasket materials are, however, typically flexible, as they are usually compressed between two other surfaces. (Having said this, it is also possible to find gaskets made of metal: such as spiral wound, or copper head gaskets.Gaskets can be used for many different purposes, such as: sound and noise reduction, anti-vibration, packaging, hygiene, sealing, and as supports and mountings.