www.supplyht.com/articles/100819-sani-seal-toilet-gasket

Sani Seal toilet gasket
October 17, 2017
Sani Seal’s tight seal Elastomer toilet gaskets can be as thin as 1/4” or as thick as 1” for use on deep or raised flanges. Multiple kits can be stacked for deeper flanges. Designed to work with all types of installations, including cast-iron, copper and plastic.
Sani Seal. saniseal.com/about-the-team