Profilitec SHOWERTEC STBO 3' x 5' Board - Pallet A multilayer tile substrate for shower and bathtub surrounds called STBO Showertec Board is comprised of fleece webbing on both sides of heat-bonded polypropylene layers. Polypropylene, a thermoplastic polymer frequently employed in various applications due to its durability and resistance to heat and moisture, is the primary material utilized in its manufacture. Packaging 3'x5' sheet panel 80 panels per pallet Fleece webbing on both sides The soft, non-woven surface fleece guarantees that the thin-set mortar is firmly anchored To make installation easier and faster, printed gridlines spaced at 3/8" (10 mm) are present on the board's surface Intended to endure the punishing circumstances found in shower and bathtub settings, where moisture, steam, and heat are always present It offers a stiff and dimensionally stable foundation for tile and other surface materials and is entirely waterproof