Selection Chart of Waterproofing Products - MapeiToilets, swimming pools, spas, balconies and terraces: all environments to be protected from water. In order to waterproof these environments efficiently it is important to: protect structures from deterioration;. improve rooms' comfort;. reduce maintenance costs to the minimum. That's why MAPEI always offers to their customers different systems for specific problems and always has the right product with suitable accessories to solve any problem. Bathrooms. Swimming Pools.