Mapelastic HPG is a ready-to-use, highly flexible, liquid acrylic waterproofing membrane for installation under ceramic tile or stone on residential and light commercial interior floors and walls. Applied by roller, trowel or brush, Mapelastic HPG offers excellent compatibility with cement-based mortars. When installed with MAPEI's fiberglass mesh , Mapelastic HPG can also be used as a crack-bridging membrane and exceeds ANSI A118.10 waterproofing standards. In addition, Mapelastic HPG is listed by IAPMO for use as a shower tray liner.