ProPan Shower Pans are made from high-density polystyrene and reinforced with fiberglass mesh and a liquid-applied waterproof coating. ProPan comes standard with code-required slope and integrated drain assembly. ProPan is field modifiable and UPC rated. They are available in standard and custom sizes. ProPan is also available in shower kits with WaterArmor ® Waterproofing Sheet Membrane for surrounding walls.