The WP INVISIBLE shower drains are a concept for a visually minimalist version of the point drain. The concealed drain is completely invisible. All you can see is the gap in the floor through which the water flows. We recommend this solution for floors made of materials that can be cut to size (e.g. stoneware or granite). The set includes a degreasing The kit includes a degreasing cloth for wiping the surface before gluing the material.