Better than wax, no leaks, worry free toilet seal, fits any drain, any toilet, can be repositioned during installation, & excessive plunging won't cause leaks, don't have to worry about getting wax on your hands, floor & toilet, no minimum temperature required for installation, seals on uneven floors or over tile floors with recessed flanges, includes a stackable wax free seal, slide on spacer & no rust brass bolts & hardware, 10 year warranty.