The term SEALER can be defined as a GASKET with six letters. A GASKET is a mechanical seal which is used to fill the space between two or more mating surfaces, generally to prevent leakage from or into the joined objects while under compression. Gaskets are commonly produced by cutting from sheet materials, such as paper, rubber, silicone, metal, cork, felt, neoprene, nitrile rubber, fiberglass, polytetrafluoroethylene (PTFE) or a plastic polymer. Gaskets are used in a variety of applications, including sealing pipe flanges, enclosures, and other assemblies.