General-purpose, transparent water-repellent solution based on silane and siloxane resins, designed for the impregnation of vertical interior or exterior surfaces. It provides water repellency to porous construction surfaces such as fair-faced and cellular concrete, bricks, cement blocks, plasters, and cement-based coatings, as well as natural or synthetic stone and other mineral surfaces. It does not form a surface film and does not significantly affect the substrate's breathability. It is characterized by high penetrating properties and does not alter the natural appearance of the substrate.