What closure method is employed in a casket designed to be watertight?

A casket designed to be watertight typically employs a top seal closure method. This type of closure ensures that there is an effective seal around the top of the casket, providing a barrier against water ingress. The top seal is created by a gasket that runs along the lid of the casket, which compresses when the lid is closed, forming a tight seal.

This method is particularly important for caskets intended for burial in areas prone to flooding or for use in maritime environments. The watertight design not only helps protect the remains but also preserves the integrity of the casket over time.

Other methods may exist, such as end seal or air seal, but they do not provide the same level of protection against water intrusion as a top seal does. This specific construction is critical for maintaining the intended functionality of the casket in varying environmental conditions.