Hermetically sealed.
Isolated, away from outside influence.
Pertaining to alchemy or occult practices; magical, alchemical.
Pertaining to Hermes Trismegistus or the writings attributed to him.
One who follows/worships Hermes.
Pertaining ancient Greek Olympian God Hermes
Not allowing passage, especially of liquids; waterproof.
Impossible to permeate.