A gasket is a mechanical seal fitted between two mating components. It is generally used to prevent leakage caused by pressure, corrosion, and thermal expansion and contraction of piping systems.

Non‑metallic Gaskets: Gaskets manufactured from non‑metallic materials such as asbestos, rubber, synthetic resin and PTFE.

Semi‑metallic Gaskets: Gaskets made from a combination of metallic and non‑metallic materials, for example spiral‑wound gaskets and metal‑jacketed gaskets.