Abstract: An energy seal for a microwave oven including resilient and conformable primary and outboard seals encompassing a choke type secondary seal. The composite seal is particularly suited to "wide gap" configurations in that the resilient elements thereof are adapted to fill the gap, conforming to a wide range of gap and oven door fit tolerances. The primary seal is capacitive in nature and includes a woven metal mesh inner cylinder surrounded by a woven fiberglass dielectric cover, the arrangement tending to oppose compression thereby to fill the gap when compressed by closing of the oven door. The choke seal comprises a cavity of predetermined depth having an aperture into the gap; the effectiveness of the choke is increased by the outboard seal which presents a very small impedance to the transmission path formed in the gap following the secondary seal. The outboard seal may be a capacitive seal similar to the primary, or a metal to metal contact seal.