The Sani Seal toilet gasket is a revolutionary development in toilet bowl-to-flange sealing that is waxless and repositionable. Its highly durable materials maintain their shape allowing movement in the toilet yet preventing a leak; while at the same time giving the installer multiple attempts at setting the toilet without risk of ruining the seal. Made of PVC, ABS, sponge rubber O-rings, and Cryanacrylate. The unique design holds the bolts upright and the gasket in place, providing trouble-free installation. Fits all flanges and standard toilets. Works great on radiant heated floors. Very easy to stack for deeper flanges.