Silicone Water Repellent Additives

Our silicone hydrophobizing additives are advanced water-repellent solutions based on functional polysiloxanes, developed to protect façade coatings and construction materials against moisture damage. By reducing capillary water absorption, these additives help coatings remain breathable while keeping building substrates dry and stable.

When incorporated into emulsion paints, silicone resin systems, silicate coatings, or filler compounds, the additives significantly reduce water penetration, preventing algae and mould growth, frost damage, and efflorescence. The result is cleaner facades, extended durability, and improved energy efficiency thanks to better thermal insulation of dry building materials.

Silsan® additives are firmly embedded in the coating matrix, ensuring long-lasting hydrophobic protection that remains effective even under extreme weathering conditions. Available as solvent-free emulsions or water-free concentrates, they offer flexible integration into a wide range of aqueous coating systems. With proven effectiveness in architectural coatings and construction applications, they are the reliable choice for sustainable and high-performance façade protection.