How is a hermetically sealing of caskets being effected and what is the difference between a gasket sealer and a glass sealer casket?

Metal caskets - or metallic liners inside of wooden casket - can obtain a protective property through an air and watertight sealing mechanism. By that way the remains in the casket are temporarily protected from the elements, especially from ground water and the intrusion of insects. Nowadays, most protective caskets are sealed by a gasket which is placed between the base (or body) of the casket and its lid. The gasket usually consists of an approximately inch wide one piece strip of flexible but resilient rubber-like material which runs along the upper margin of the frame of the casket's base. In a casket with a split lid (half couch casket) an additional gasket between the two halves of the lid is needed for effecting a hermetical seal.