Knauf Water Resistant Gypsum Backing Boards are ASTM C1396 compliant gypsum boards, specifically designed for use in areas with humidity and exposure to moisture. Field of Application: Knauf Water Resistant Gypsum Boards (GB-WR) are high performance gypsum boards used as the cladding component of drywall constructions in humid areas such as: Partition or Ceilings of Kitchens / Bathrooms Wall Linings / Furrings in Kitchens / Bathrooms Partitions with tiled finish requirements Any internal area which is exposed to humidity [button et_class="" target="_blank" style="small" url="https://geminiuae.com/wp-content/uploads/2022/11/Knauf-Water-Resistant-GB-WR.pdf" icon="" title="Download Datasheet"] Properties Lightweight constructions Easy, fast and dry application Good sound insulation performance Hydrophobic boards impregnated against absorption of moisture A material that breathes and balances room climate and humidity levels Environmental friendly Limitless design options.