Abstract: A gasket for sealing between a toilet base a closet flange has a ring of water impermeable elastomer having a ring upper surface spaced apart from a ring lower ledge by a separation distance S sufficiently large that the ring becomes compressed between the toilet and the closet flange. The ring is sized to cover a portion of the closet flange while fitting between mounting bolts used to secure the toilet to the closet flange. The gasket also has an annular extension attached to the ring and sized to fit into the closet flange. The ring may be rectangular or trapezoidal in cross section. A preferred embodiment has a quasi-trapezoidal cross section with a groove that provides the ring with increased compressibility.

Abstract: A gasket for sealing between a toilet base a closet flange has a ring of water impermeable elastomer having a ring upper surface spaced apart from a ring lower ledge by a separation distance S sufficiently large that the ring becomes compressed between the toilet and the closet flange. The ring is sized to cover a portion of the closet flange while fitting between mounting bolts used to secure the toilet to the closet flange. The gasket also has an annular extension attached to the ring and sized to fit into the closet flange. The ring may be rectangular or trapezoidal in cross section. A preferred embodiment has a quasi-trapezoidal cross section with a groove that provides the ring with increased compressibility.