SIPERNAT® specialty silica for defoamers

SIPERNAT® specialty silica and AEROSIL® fumed silica are used in defoamer, foam inhibitors, foam regulators and/or deaerator formulations based on various hydrophobic liquids such as mineral oil, silicone oil and/or vegetable oil. Properly dispersed in oil, SIPERNAT® and AEROSIL® effectively disrupt the formation of bubbles in most kinds of foams by impairing bubble stability and causing bubbles to burst as they begin to form

• SIPERNAT® specialty silica and AEROSIL® fumed silica are effective defoamer boosters (hydrophobic & hydrophilic)
• SIPERNAT® specialty silica grades are preferred as carriers for powder defoamer
• AEROSIL® fumed silica is often used as a rheology modifier and antisettling agent in oil and emulsion formulations

Detailed product and application information can be found in brochure TI 1313 – “SIPERNAT® and AEROSIL® for Defoamer” from our Download Center

Defoamer Boosters - Hydrophobic

SIPERNAT® D 10 / SIPERNAT® D 13* / SIPERNAT® D 17

Hydrophobic SIPERNAT® specialty silica allows for the convenient manufacture of effective defoamer and/or foam inhibitors. SIPERNAT® D 10, SIPERNAT® D 13*, and SIPERNAT® D 17 offer the optimal particle size for many industrial defoamer/deaerator applications.
* SIPERNAT® D13 is available in North America only. 


AEROSIL® R 202 / AEROSIL® R 812 / AEROSIL® R 812 S / AEROSIL® R 972 / AEROSIL® R 974 / AEROSIL® R 816 

Hydrophobic AEROSIL® fumed silica allow for the convenient manufacture of effective defoamer and/or foam inhibitors. They have the optimal particle size for many industrial defoamer/deaerator applications. Due to their adjusted hydrophobicity AEROSIL® R 972, AEROSIL® R 974 and AEROSIL® R 816 are particularly compatible in various coating applications. 

Detailed product and application information can be found in brochure TI 1381 AEROSIL® and SIEPRNAT® - Efficient Booster for Defoamer in Paints and Coatings“ .

Defoamer Booster - Hydrophilic

SIPERNAT® 35* / SIPERNAT® 383 DS 

The hydrophilic silica grades SIPERNAT® 35* and SIPERNAT® 383 DS are ideally suited for in-situ hydrophobization in mineral and/or silicone oil and dry roast hydrophobization. Due to the particle nature, alkaline catalysts are not needed for this reaction. SIPERNAT® 35* and SIPERNAT® 383DS are pre-milled for easy processing and optimal defoamer performance. 
(* SIPERNAT® 35 is available in North America only).

SIPERNAT® 320 DS 

SIPERNAT® 320 DS has a good reactivity with silicone oil when manufacturing hydrophobic booster silica for defoamer. However, a catalyst is needed for optimal hydrophobization results. SIPERNAT® 320 DS is already pre-milled for optimal defoamer performance.

Carrier for Powder Defoamer 

SIPERNAT® specialty silica is often used as carrier substance for powder defoamers, e.g. for the construction industry, powder detergents and oilfield applications. Liquid, semisolid, or paste-like defoamer formulations can be converted into powder form by means of SIPERNAT® specialty silica allowing for a more precise dosing and homogeneous distribution. 

Detailed information can be found in the brochures TI 1360 “SIPERNAT® and AEROSIL® – an Essential in Industrial Powder Technology” and TI 1213 “Specialty Silica as Flow Agent and Carrier Substance - Recommended Mixing Procedures for Powders and Granulates”.

Antisettling Agent 

Hydrophilic and hydrophobic AEROSIL® grades are used as viscosity modifier of oily liquids, like mineral-, silicone-, and vegetable oil. Especially in combination with SIPERNAT® D 10 their thixotropic properties are pronounced. 

More detailed information can be found in the brochure TI 1391 “Improving Sedimentation Stability of SIPERNAT® D 10 in Mineral Oil based Defoamer Formulations”.