WATERREPELL SNL is consist of a reactive Oligomer Siloxane solution which provides serves to render inorganic substrates such as mineral construction materials water repellent and oil repellent. WATERREPELL SNL is highly alkali stable, i.e. the substrate to be impregnated may have pH value up to 14 without impairing its effect. Unlike other impregnating agents, which display only water-repellent effect, WATERREPELL SNL also exhibits an oleophobic, i.e. oil repellent effect. Oil, grease and paint etc. can be more easily removed from surfaces that have been treated with WATERREPELL SNL. WATERREPELL SNL has very good penetration capacity and reacts chemically in the building material in presence of humidity, converting into a water repelling, UV-Light stable and weather resistant ingredient. After application, the active ingredients are deposited as macro-molecular layer on the capillary and pore walls without impairing water vapour diffusion capacity. Surfaces of building materials treated with WATERREPELL SNL have much less tendency to soil. Resistance to frost and de-acing salts is improved, helping to reduce loss of energy.