HydroSil BS prevents water penetration through walls and roofs as it is exposed to rain, snow, and other forms of moisture. Without a water-repellent seal, water can penetrate through cracks, joints, or porous materials like concrete, brick, or wood, leading to damage to both the exterior and interior of a building.

HydroSil BS consists of ultra fine particles, measured in the millionth of a millimetre. Its special composition enables it to actively bind to mineral surfaces thus providing long-term protection. As HydroSil BS is water-based, it is very easily absorbed into surfaces and does not give off harmful or solvent vapours.