Nanjing SiSiB Silicones Co., Ltd.
Nanjing SiSiB Silicones Co., Ltd.
SiSiB® FS5115
SiSiB® FS5115

Hydrophobic Fumed Silica

SiSiB® FS5115 is a hydrophobic fumed silica after treated with DDS (Dimethyldichloro silane) based on a hydrophilic fumed silica with a specific surface area of 150m2/g.

SiSiB® FS5115

Technical Data



Specific surface area (BET)

100 - 130m2/g

pH-Value in 4 % aqueous dispersion

3.7 - 4.5

(1:1 mixture of water and ethanol)

Loss on drying (2h at 105°C) wt.%

Max. 0.7

Loss on ignition (2h at 1000°C) wt.%

Max. 2.5

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.%

0.6 – 1.2


  • RTV silicone sealants, especially electronic potting.

  • Adhesives and Sealants.

  • Powder and 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® FS5115 has a shelf life of 24 months under dry conditions.

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SiSiB® FS5115