Mapei Mapeguard Board 1/2" x 4' x 8' - 5 Sheet Bundle Multi-purpose, lightweight, waterproof panel for the installation of all types of ceramic and natural stone finishes Features Rigid, lightweight, waterproof foam backer board Impact-resistant board Low perm rating Tab washers are not required on floors and walls Easy to cut with a standard utility knife 5 boards per bundle Mapeguard Board Application Examples Leveling of uneven walls, including un-plastered walls Levelling of existing surfaces (deteriorated/damaged plaster or old tiling) Creating furnishing elements such as shelves and surrounds for sinks and sanitary ware Creating room partitions and walls for shower cabins Surrounds for bathtubs Creating benches and seats in bathrooms and damp environments, such as health and wellness centers Waterproofing surfaces before installing tiling (Mapeguard Board has a waterproof surface: sealing joints between each guarantees water tightness of the entire wall or assembly) Suitable Substrates Concrete Cementitious and gypsum-based plaster (after applying suitable primers such as Primer G or Eco Prim T Plus) Existing ceramic wall tiles Wooden structures