XPERT Hydro Coat is a penetrating, breathable, moisture repellent for exterior concrete and masonry surfaces. It contains 5% active silicone resin in a petroleum distillate solution. XPERT Hydro Coat is a clear liquid which penetrates and will not form a film on the surface. When applied at the proper coverage rate on a properly prepared surface, XPERT Hydro Coat will normally not alter the appearance of treated surfaces.