Hydro shield is recommended for a “Hydrophobisation” (water repellency) of facades . It is used as a general purpose water repellent for absorbent, mineral and even alkaline substrates, such as natural stone, brick concrete and sand lime brick, as well as for mineral paints and stuccos. HYDRO SHIELD is also suitable as a primer for dispersion based paints and stuccos, silicone resin paints and stuccos, concrete coatings, and as a water repellent for the in-plant treatment of lightweight aggregates and clay building materials, aerated concrete, sand-lime brick, fiber reinforced concrete and mineral fiber materials.