Waterproof Backer Board for Tile and Stone Installations HYDRO-BLOK® Wallboard is a waterproof foam backer board designed for tile, stone, glass, and mosaic installations in both wet and dry environments. Its XPS foam core, fiberglass mesh reinforcement, and cement-coated surface provide a durable substrate for residential and commercial tiled wall assemblies. Engineered for Strength and Moisture Protection The waterproof XPS foam core resists moisture throughout the panel while fiberglass mesh reinforcement and the modified cement coating create a stable bonding surface for tile installations. The lightweight construction makes handling easier without sacrificing rigidity or performance. Easy to Cut and Customize HYDRO-BLOK Wallboard can be cut using a utility knife, hand saw, or circular saw, allowing installers to easily create corners, transitions, niches, and custom layouts. The foam core simplifies fabrication while maintaining waterproof performance. Compatible with HYDRO-BLOK Fastening Systems Wallboard installs using approved HYDRO-BLOK® washers and screws for secure mechanical fastening. It is suitable for shower walls, wet areas, and other tiled wall applications requiring a waterproof tile backer board.
