In burial vaults, what method of sealing involves an epoxy compound and a tongue-in-groove closure?

The method of sealing that involves an epoxy compound and a tongue-in-groove closure is known as a top seal. This sealing technique provides an airtight and watertight seal, effectively protecting the casket and remains inside the vault from external elements. The use of an epoxy compound enhances the durability and strength of the seal, ensuring that environmental factors such as moisture and soil do not penetrate the vault over time.

In contrast, other sealing methods may employ different techniques or do not incorporate the same type of materials or closures. For example, a bottom seal typically relies on a different sealing mechanism and may not involve the epoxy compound nor the tongue-in-groove design. Understanding these distinctions is essential for funeral service professionals as it affects both the quality and effectiveness of the burial vaults they offer.