Schluter-KERDI-SEAL-PL is a pipe sealing sheet made out of the Schluter-KERDI waterproofing membrane. The circular sheet has an opening in the middle for a pipe to pass through, sealable by Schluter-KERDI-FIX sealing compound, and also includes an overmolded rubber gasket. Product Features Vapor Retardant The Schluter-KERDI waterproofing membrane has a very low water vapor permeance, making it an excellent waterproofing membrane for shower, bath, and steam room installations.