Yes, unlike some membrane covered foam type backerboards or cement backerboards that can wick moisture or water, ProTile™ building panels are wick resistant. You can actually install ProTile™ building panels to the bottom of pan liner, before you float the mud bed base up against them with no negative effect. Once you’ve waterproofed the mud bed, the result is a wick resistant – watertight installation that’s ready to receive your choice of tile or stone.