Back potted epoxy hermetic seals provide fully harnessed pressure and vacuum sealing solution that can be customized to avoid some of the drawbacks associated with generic glass or ceramic connectors. Design engineers can specify from range of commonly available plastic and metal connectors, from jam-nut and O-ring to wall mount, radial O-ring and others including the accommodation of fiber optic connectors and cables. Today's range of high-performance epoxies greatly extend the application range of this versatile hermetic sealing option; epoxy material can withstand pressure up to 15,000 psi and temperatures ranging from cryogenic to over 350°F.