An oil seal, also known as a shaft seal, is a component used to prevent oil from leaking out of an engine or gearbox.It is made from high-quality materials that are resistant to heat, friction, and wear. The oil seal fits tightly around the shaft of the engine or gearbox, forming a barrier that prevents oil from escaping while also keeping dirt and other contaminants out. Oil seals are critical components in any vehicle's engine or transmission system and play an essential role in ensuring its smooth operation.