The exclusive StoneFlex designs make it possible to build or renovate a pool using a water-tight membrane with a 3D surface that looks like real stone. StoneFlex membranes are formulated with an enhanced surface coating which ensures superior stain resistance, easy cleaning, and exceptional UV resistance, as well as a dry-stone feel and non-slip grip. StoneFlex surfaces are covered with 6 layers of protective acrylic coating. This membrane withstands temperatures of up to 32°C and comes with a 5-year guarantee against stains and discolouration.