AEROSIL COK 84 Hydrophilic fumed mixed oxide 1344-28-1 Degussa-Silanes Rheology Modifier/ Thickener Coatings >> Waterborne AEROSIL® COK 84 is a mixture of AEROSIL® 200 and highly dispersed fumed aluminum oxide in the ratio of 5:1. It possesses rheologiy control in aqueous and highly polar liquids and binder systems, pseudo plasticity and thixotropy. It is used in coatings paste, waterbased coatings, aqueous coatings. Highly dispersed fumed aluminum oxide. Used in coatings paste, waterbased coatings and aqueous coatings. Offers pseudo plasticity and thixotropy. Possesses rheology and thixotropy control of highly polar liquids, binder systems.