Gaskets and sealings create static, leak-proof barriers between mating engine, transmission, and chassis components. These parts utilize compressed materials – including elastomers, graphite, and multi-layer steel – to maintain fluid and gas containment across surfaces with imperfections. Applications span valve cover seals, oil pan gaskets, head gaskets, O-rings, and static seals for coolant and fuel systems. Material selection is critical, factoring in temperature, pressure, and chemical compatibility with the contained media. Precise dimensional tolerances and surface finish are essential for effective sealing and prevention of component failure.