Abstract: A seal for a cavity plate in a microwave oven is described herein. The seal includes a seal body having an outward sealing surface defined around a seal perimeter. The outward sealing surface is configured to seal against inward facing walls of a microwave oven. The seal body also includes an inward sealing surface spaced inward from the outward facing surface. The inward sealing surface is configured to seal against an outer edge of a cavity plate. The seal further includes a plurality of seal supports extending from the seal body on a cavity side of the seal body for maintaining cavity spacing between a bottom microwave oven surface and the seal body.