Schluter-KERDI-SEAL is a prefabricated seal that is cut sections of the Schluter-KERDI waterproofing membrane designed to seal protrusions through the Schluter-KERDI or Schluter-DITRA/DITRA-XL, as well as Schluter-KERDI-BOARD building panels. Schluter-KERDI-SEAL features overmolded rubber gaskets and are used to seal pipe protrusions and protect moisture-sensitive solid backing panels at the mixing valve.