What's the noun for sealest? Here's the word you're looking for.
seal
A stamp used to impress a design on a soft substance such as wax.
An impression of such stamp on wax, paper or other material used for sealing.
(Discuss(+) this sense) A design or insignia usually associated with an organization or an official role.
Anything that secures or authenticates.
(Discuss(+) this sense) Something which will be visibly damaged if a covering or container is opened, and which may or may not bear an official design.
Confirmation or an indication of confirmation.
Something designed to prevent liquids or gases from leaking through a joint.