Steam sauna TYCROC FXL & FXW TYCROC FXL & FXW Bendable and flexible waterproof building boards / tile backer boards for use in bathrooms, steam saunas, pools and spas. TYCROC TWP TYCROC TWP Waterproof building boards / tile backer boards for use in bathrooms, steam saunas, pools and spas. FASTENING & INSULATING COMPONENTS FASTENING & INSULATING COMPONENTS Adhesives and tapes, as well installation washers, screws and dowels.