Fumed silica

Fumed Silica

Fumed silica, also known as pyrogenic silica or silicon dioxide, is a highly versatile and finely divided form of silicon dioxide, primarily produced through a process called pyrolysis. Fumed silica is characterized by its unique physical and chemical properties, making it valuable in various industries and applications.


Fumed silica finds applications in several industries and scenarios, including:

  • Deco (Decoration): Fumed silica may find applications in decoration industries for its rheological properties, which can enhance the performance of decorative materials and coatings.
  • Industrial Coatings: Fumed silica is used in industrial coatings to provide thickening, thixotropic properties, and reinforcement, improving coating performance and application.
  • Marine & Protective Coatings: In the marine and protective coatings industry, fumed silica can enhance the anti-sagging and anti-settling properties of coatings, ensuring uniform and durable protection.
  • Floor Coatings: Fumed silica contributes to the thickening and reinforcement of floor coatings, enhancing their durability and resistance to wear and abrasion.
  • Building & Construction: Fumed silica is used in construction materials to improve their rheological properties, aiding in the formulation of mortars, grouts, and sealants.
  • Inks & Toner: Fumed silica may be used in inks and toners to enhance viscosity control and print quality in printing and imaging applications.
  • Energy: Fumed silica may find applications in the energy sector, such as in battery manufacturing and insulation materials, where its properties are beneficial.
  • Automotive: In the automotive industry, fumed silica can be used in coatings, sealants, and adhesives to enhance their performance and durability.
  • Lubricants & Greases: Fumed silica is employed in lubricants and greases to provide thickening and anti-settling properties, improving their lubricating capabilities.
  • Adhesives & Sealants: Fumed silica is used in adhesives and sealants to enhance their rheological properties and adhesion performance in various bonding applications across industries.

Unique Properties

Fumed silica offers unique properties and advantages, including:

  • High Surface Area: Fumed silica has an extremely high surface area, which provides excellent reinforcement and thickening properties.
  • Thixotropy: It exhibits thixotropic behavior, meaning it becomes less viscous when subjected to shear stress and regains its viscosity when at rest.
  • Chemical Inertness: Fumed silica is chemically inert and does not react with most substances, making it compatible with various formulations.
  • Lightweight: It has a low bulk density, making it lightweight and suitable for use in applications where weight matters.
  • Non-Toxic and Non-Carcinogenic: Fumed silica is considered safe for use in various industries.

Alternative for

The choice of using fumed silica depends on specific application requirements, including viscosity control, reinforcement, and suspension properties. Alternatives may include other types of fillers, thickeners, or rheology modifiers, depending on the desired characteristics and cost considerations. The selection is influenced by factors such as surface area requirements, compatibility with other materials, and regulatory compliance. Fumed silica is preferred when its unique combination of properties aligns with the application's needs, particularly when fine-tuning rheological properties and enhancing performance are essential.

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