BETONCRYLL WATER-REPELLENT by OIKOS is a special protective coating for concrete with a transparent colourless finish. The product is based on silicone/siloxanic resins in water dispersion which penetrate the substrate deeply and provide a water-repellent barrier, which maintains the vapour permeability and the aspect of the substrate unaltered. It avoids water stagnation on the surface, allows rainwater to slide along the walls preventing absorption and reducing dirt retention. It can also be used on brickwork, grès, tiles, stone and cement or lime-based plasters. It is odourless, non-toxic, non-flammable and environmentally friendly.