Perfect Seal Wax Ring is an innovative new product that takes the guesswork out of toilet installation. It fits any drain size and flange depth. Whether your flange is above the floor or below, the Perfect Seal Wax Ring guarantees a perfect seal every time. The patented seal design combines specially designed rubber gaskets with encapsulated wax to form a three times stronger seal than a wax ring without the mess. Unlike wax rings, the Perfect Seal Wax Ring stabilizes toilet bolts and allows you to reposition the toilet when needed. It accommodates flange heights from 1/2 in. above the floor to 1-1/2 in. below the floor and maintains a tight seal when common toilet and floor movement occurs. Depending upon the height of the floor flange and the toilet horn, there may be instances when the toilet may not sit flush to the floor. In such a situation, the black plastic ring placed inside the Perfect Seal's gray rubber casing can be removed. The removal of this hard plastic ring will allow the Perfect Seal to compress fully, and the toilet should then sit flush with the floor.