A gasket is an air-filled, usually plastic, seal that fills the gap between two or more moving surfaces, usually to prevent leakages or escapes of the joined parts while under pressure. The term ‘gasket’ comes from the French ‘gachet’ (seam). Gaskets are commonly used in conjunction with a camshaft, a shaft attached to a crankshaft, to prevent ground leaks. Camshafts are also used in some cars. You may find more details about this at read here
Gaskets can be made out of several different materials, but their basic structures are very similar. They are typically made out of steel or aluminum and are available in several different design types, from flat and ribbed to leaf-shape and V-groove. In addition, gaskets can also be made from a variety of synthetic materials, including acrylic, polystyrene (plastic like sheet) and rubber. Different construction techniques can be applied to the different materials, depending on the degree of sealing required – some sealants are oil-based, others are water-based.
Gasket design has come a long way from its original design, originally consisting of a thin layer of metal attached to each other, to ensure that leaks were not allowed to enter the engine compartment. However, because of the recent interest in fuel efficiency, manufacturers have been able to make modern gaskets highly efficient in terms of energy consumption and fuel economy, as well as highly resistant to stress and impact. Modern gasket designs are constructed with minimal intrusion into the bore and sturdiness, allowing for the use of different sealing methods, such as hinged flange seals, interlocking flange seals, and gasket plugs.