Sealed and Waterproof: The insert shower niche uses a triple-layer waterproof base of XPS foam board, cement mortar, and waterproof coating, ensuring 100% sealing. It safeguards walls from wet and humidity, extending their lifespan and avoiding water penetration, keeping interiors dry and hygienic. Note: This product needs to be used in conjunction with waterproofing materials, not on its own!!!! High-Quality Materials: Made from (HCFC-free) XPS foam board, this niche offers exceptional durability, decomposition-resistant and decay-proof. Additionally, XPS foam is lightweight, easy to handle, and place. Multiple Craftsmanship: The surface features a double layer of cement mortar reinforced with fiberglass mesh, offering superior rigidity and load-bearing capacity, withstanding up to 62kg/m² (about the weight of an adult)