No need to demolish your existing shower , Concrete Overlays can be applied over existing tile, marble, fiberglass, porcelain and acrylics. These polymer cement overlay products are 100% waterproof and bacteria resistant. No more worries about mold in grout lines and corners. The chemical resistant urethanes we use are non breathable and will not allow buildup in pores. These products can also be used to build you a custom shower tub or sink specifically designed to your taste. Easy maintenance and completely seamless.