GYPSUM JAYA BOARD 9 MM AND 13 MM WR ( WATER RESISTANT ) - 13 MM Wet-Area Optimum is a SHEETROCK gypsum board that contains wax/silicon, which is specially developed for the installation of tile-backer* and flexible ceilings. Wet-Area Optimum can be used not only as a partition, but also as a ceiling. *tile backer is the installation of ceramic/marble/similar tiles on the surface of the gypsum board Physical Properties: Weight: 5.5 Kg/m2 (9mm thick) amp; 7.9 Kg/m2 (13mm thick) Thickness: 9 amp; 13 mm Length 2400 mm Width: 1200 mm Sustainability: Asbestos-free Low TVOC content Non-radioactive material Recyclable material Installation Recommendations: Suitable for bathroom partitions. Suitable for partitions in damp rooms Features amp; Benefits: - Optimal flex resistance - Suitable for application with ceramics - The only screw line innovation in Indonesia - Special formula for tile backer application