Used as a thickening and reinforcing agent in silicone rubbers and resins, providing improved mechanical strength and thermal stability. Acts as a free-flow agent in powders and prevents caking in food and pharmaceutical products. Enhances the stability of coatings and inks by preventing pigment settling. Functions as a matting agent in paints and varnishes to reduce gloss. Improves the rheological properties of adhesives and sealants, enabling better application control. Also utilized in composite materials to increase hardness and wear resistance.

In the rubber and plastics industry, nano fumed silica reinforces strength, flexibility, and abrasion resistance, extending product lifespan. In electronics, it is incorporated into encapsulating resins to protect against moisture and impact. In cosmetics and skincare products, it controls oiliness, facilitates easy spreading for a smooth texture, and ensures uniform dispersion of active ingredients.

Additionally, it finds applications in the medical field, such as in dental molds or as a filler in biocompatible materials, due to its compatibility with the body and lack of irritation.