olemus
Wiktionary:
(transitive) to seal (something) again (in any sense of "apply a seal to")

Merriam-Webster:
b: to close (an opened envelope, bag, etc.) again especially by sticking or pressing two of its parts together
// If not resealed well, cereal, chips, rice, and pasta go stale …
// He taught me how to … steam and reseal envelopes …
// Staff analysts know the molecular structure of the glue Goody's uses to seal its containers of headache powder, so investigators can tell if someone opened a package and resealed it.