PROVA-SHOWER KIT® is the ultimate waterproofing system for tiled showers. These kits include all components needed to build a fully bonded, water-tight walk-in shower. High-density expanded polystyrene shower pans eliminate the need for time-consuming mortar base and are presloped to guarantee proper drainage every time when installed on a suitable substrate that is level, flat, and structurally sound. Waterproofing components included are made of polypropylene PROVA-MAT® membrane and are preshaped and pre-cut to install easily and quickly.