Many people have the wrong misconception that cement based wall panels cannot be used in wet areas but EPS Cement Sandwich Wall Panel actually shows very impressive waterproof performance when produced with the correct optimized formulation. The special low water absorption cement mix used for the outer shell of EPS Cement Sandwich Wall Panel gives the entire panel a total water absorption rate below 5 percent which is far lower than the water absorption rate of traditional aerated concrete blocks. This low water absorption property means that even if the surface of EPS Cement Sandwich Wall Panel gets splashed with water the moisture will not penetrate deep into the panel structure and cause internal damage. For applications in bathrooms showers and kitchens you only need to apply a standard layer of waterproof coating on the surface of EPS Cement Sandwich Wall Panel before tiling and the wall will provide completely reliable long term waterproof performance. Unlike gypsum based boards that will swell and lose all strength after getting wet EPS Cement Sandwich Wall Panel maintains 100 percent of its structural strength even after being immersed in water for multiple days. Many hotel projects that use EPS Cement Sandwich Wall Panel for all bathroom partitions have reported zero water related wall damage issues even after more than 10 years of continuous daily use.