ProPan WPM Shower Pan Kit is a UPC rated pan that is constructed of lightweight, high-density expanded polystyrene, fiberglass mesh and a liquid waterproof membrane finish coat. ProPan adheres to industry standard 1/4” per foot drain slope and comes standard with integrated drain assembly. ProPan is 100% waterproof and ready-to-tile. WaterArmor WP Membrane is a 2m (6’6”) wide, thin load bearing, bonded, sheet membrane for waterproofing applications. WaterArmor WPM meets ANSI A118.10 for Load Bearing, Bonded, Waterproof Membranes and ANSI A118.12 for Crack Isolation Membranes. It’s in compliance with UPC and IPC and is IAMPO listed.