BAVASIL® 1305 is an additive used in the manufacture of whitewash emulsions, silicate emulsion paints and plasters, highly filled emulsion coatings and silicone resin emulsion paint and silicone resin plasters. The addition of BAVASIL® 1305 enhances water repellency (droplet effect) and water resistance without influencing water-vapour permeability. Especially silcate paints and silicate emulsion paints and plasters can be improved significantly.