Schluter-KERDI-BOARD-V is a vertically grooved substrate and building panel that can be used to create elements. Suitable for installing over masonry or mixed/uneven substrates, the panel consists of an extruded polystyrene foam core, reinforcement layer, and fleece webbing. Panels of the waterproof substrate can be connected along the edges with thin-set mortar, Schluter-KERDI-FIX adhesive, or double-sided adhesive tape. 800-472-4588, SchluterKERDIBOARD.com.