REARM STONE GUARD – W is a ready-to-use water-repellent treatment designed to protect porous construction surfaces from water ingress while preserving their natural appearance. The product is based on alkali alkyl siliconate technology and penetrates into the substrate to create a durable hydrophobic barrier. It helps reduce moisture absorption, minimizes efflorescence, limits dirt accumulation, and enhances long-term durability of exterior and exposed masonry surfaces without forming a visible film. It is suitable for concrete, stone, brickwork, plaster, and other mineral substrates where protection against rain penetration and moisture damage is required.