Fernco 4" Wax Free Toilet Seal. This strong, flexible adhesive creates a secure seal to the bottom of the toilet, accommodating floors raised above the toilet flange by 3/4". It seals on raised floors, wood, tile, linoleum, and carpet, making it ideal for in-floor radiant heat installations. No more guessing if there is a positive seal. ASTM A1045 specified. Easy, 1-piece design. Quick and easy 2-step installation. Clean to install, no wax. Gas and water-tight. Seals to the toilet flange below the floor. The seal will not break if the toilet ever becomes backed up. Connects toilet to 4-inch drains. Packaging: 1 Seal.