1. **Thickening Agent**: Fumed silica is widely used as a thickening agent in various industries, including adhesives, sealants, coatings, and cosmetics. When added to liquid formulations, Aerosil powder can increase viscosity and improve thixotropic behavior, making the product easier to apply and enhancing its stability.

2. **Reinforcing Filler**: In polymer composites and rubber products, Aerosil powder is used as a reinforcing filler to improve mechanical properties such as tensile strength, tear resistance, and abrasion resistance. It can also enhance dimensional stability and reduce shrinkage.

3. **Anti-Caking Agent**: Aerosil powder is often added to powders and granular materials as an anti-caking agent to prevent clumping and improve flowability.

4. **Matting Agent**: In paints, coatings, and printing inks, fumed silica can be used as a matting agent to reduce gloss and create a matte or satin finish.

5. **Thermal Insulation**: Fumed silica has low thermal conductivity, so it is sometimes used as a filler in insulation materials to improve thermal resistance.

6. **Absorbent**: Fumed silica can absorb liquids and gases, making it useful in applications such as desiccants, catalyst supports, and odor control products.

Aerosil powder is available in various grades and particle sizes to suit different applications and requirements. It is valued for its high surface area, purity, and versatility in a wide range of industries.