Water-repellent impregnation liquid, based on silicone resins and solvents, with high penetrating ability (MICRO TECHNOLOGY), which provides waterproofing and prevents the appearance of greenery on vertical surfaces. It protects the plaster from decay and the concrete from carbonation for at least 10 years. It is completely transparent, does not yellow, does not create a surface film, due to its high penetrating ability (MICRO TECHNOLOGY) it does not shine, does not stick when dry, and withstands alkaline environments. The combination of waterproofing and breathability ensures energy efficiency.