Schluter®-KERDI-BOARD is a multifunctional tile substrate and building panel, which can also be used in bonded waterproofing assemblies with tile. KERDI-BOARD allows you to quickly and easily build tile-ready elements in showers, bathtub surrounds and platforms, countertops, vanities, shelving, and more! It replaces other suitable solid backing panels (i.e. gypsum board, cement backer board), and is waterproof, thermally insulating and dimensionally stable.