Coatings and paints Fumed Silica functions as stabilizer, preventing settling of pigments, it acts as anti-sedimentation additive. Fumed Silica can also be used to modify the system thixotropy and regulate viscosity. This silica is colorless and transparent in clear lacquers. In powder coatings, Fumed Silica promotes free-flow, prevents caking and modifies electrostatic effects. Fumed silica is also used to control gloss in some coatings applications, such as urethane satin finishes.
Sealants and Adhesives In adhesives and sealants, Fumed Silica is used as a thixotropic agent, as a thickener and to control sag. Fumed silica in these products can also be used as reinforcing filler. Fumed Silica is especially useful in industrial adhesives for high-speed machine application. It allows automated systems to tolerate wide range of temperatures. RTV*1 and RTV*2 silicone rubber based sealants use Fumed Silica silicas for rheology control and reinforcing properties. Similarly, polyurethane-based sealants benefit from improved rheology and mechanical strength.
Printing Inks
Fumed Silica finds many uses in print inks, such as letterpress, gravure and flexographic printing. It helps control flow, prevents smudging by increasing rate of gelling, and improves image definition.
Rubbers and rubber compounds

Fumed Silica serves as reinforcing filler, enhancing all mechanical properties, including rigidity, tensile strength, and tear strength. One of the most important fields of it'sapplication is compounding of silicone rubber. Fumed silica greatly enhances properties in heat cured silicone rubber compounds that far exceed its cost. As such, silicone rubber, with its superior heat and chemical resistance is found in a wide variety of consumer products.

Fumed Silica is used as thickener and thixotropic agent in production of insulation materials for copper and fiber-optic cables.