A leak preventer is a device used to stop the flow of liquids or gases from escaping. It typically consists of three components: a SEALANT, a washer, and a GASKET. The SEALANT is a material that is applied to the surface of the leak preventer to create a tight seal. The washer is a flat piece of metal or rubber that is placed between the SEALANT and the GASKET to provide additional protection against leakage. The GASKET is a flexible material that is placed between the washer and the surface of the leak preventer to form a tight seal. Together, these components work to prevent any liquids or gases from escaping.