RYOT4 MWR 290 is a Solvent based Water repellent silicone concentrate that is based on a mixture of silane and siloxane. It is dilute able with organic solvents. Dilute solutions of RYOT4MWR (s) in organic solvents serve as high-quality general-purpose water repellents for impregnating and priming mineral and highly alkaline substrates. It is used for imparting colorless surface to mineral building without significantly reducing water vapor permeability.