Nanjing SiSiB Silicones Co., Ltd.
Nanjing SiSiB Silicones Co., Ltd.
SiSiB® FS9120
SiSiB® FS9120

Hydrophobic Fumed Silica

SiSiB® FS9120 is a hydrophobic fumed silica after treated with HMDS (Hexamethyldisilazane) based on a hydrophilic fumed silica with a specific surface area of 150m2/g. 

It’s a kind of high purity colloidal white silicone powder.

SiSiB® FS9120

Technical Data



Specific surface area (BET)

105 - 135 m2/g

pH-Value in 4 % aqueous dispersion

5.5 - 7.5

Loss on drying (2h at 105°C) wt.%

Max. 0.5

Loss on ignition (2h at 1000°C) wt.%

Max. 4.0

Silica content (based on ignited material) wt.%

Min. 99.8

Tamped density (2h at 105°C) g/L

40 - 60

Carbon content (2h at 105°C) wt.%



  • Elastomer, e.g.: HTV&RTV silicone rubber, SLR.

  • Negative Toners.

  • Powder Coatings.

Packing and Storage

  • 20’ft GP container can load 1800kg with 10 pallets; 40’ft HQ container can load 4000kg with 20 pallets.

  • In the original unopened packaging, SiSiB® FS9120 has a shelf life of 24 months under dry conditions.

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SiSiB® FS9120