Evonik Industries has launched Aerodisp WR 8520 waterborne dispersion based on hydrophobic, or water-repellent, silica. Coatings based on this dispersion can be formulated for improved corrosion resistance. Aerodisp WR 8520 improves rheology control and anti-settling behavior and pigment stabilization in coatings, according to the company. Aerodisp WR 8520 dispersions allow dust-free handling of Aerosil silica powder in liquid media. They are ready to use and easy to handle.