Which method is used for sealing the top edge and lid of a vault?

The method used for sealing the top edge and lid of a vault is referred to as a top seal. This sealing technique is critical in ensuring that the contents of the vault are protected from external elements, such as moisture, air, and contamination. A top seal aids in creating a secure barrier that enhances the integrity of the vault, making it essential for preservation purposes.

In contrast to the other sealing methods, such as a bottom seal, side seal, or base seal, which focus on different areas of containment, the top seal specifically addresses the vulnerability of the upper section of the vault. This makes it particularly effective in safeguarding valuable items stored within. Seals that are positioned at the bottom, sides, or base are geared towards other structural needs and do not provide the same level of protection for the top opening, which is often the most exposed part of the vault.