Cabin seal – When building a shower cubicle from ceramic elements, you should think about the proper sealing of the walls. Usually, we build cabins in the corner, because you only need to add one wall. But this wall and the existing one, before laying the ceramic tiles, must be covered with the flexible Sopro FDF sealing coating. 525. However, all corners, as well as the outputs of the water and drainage systems are sealed with special tapes and gaskets. Only after that, the tiles are glued directly to the substrate with adhesive mortar.