HIFULL HB-151 is hydrophobic fumed silica which is produced by hydrophilic fumed silica with specific surface area of 150m2/g after chemical post-treatment with DDS(Dimethyldichlorosilane).


RTV silicone rubber,especially RTV-T

Adhesives & Sealants

Coatings & Printing ink

Powder Coating


Thixotropy and reinforcement in RTV silicone sealants, the hydrophobic feature gives RTV silicone sealants a long shelf-life

Rheology control in adhesives

Anti-settling, anti-sagging and thixotropy control

Free flow aid and anti-caking aid for powders

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 Physical & Chemical Data

PropertiesUnitTypical ValueTesting Standard
 Specific surface area(BET) m2/g130±20GB/T 20020
pH value in 4% dispersion (H2O:Ethanol=1:1)-3.7~4.5GB/T 20020
Loss on drying(2 hours at 105℃)%≤0.7GB/T 20020
Loss on ignition(2 hours at 1000℃ based on material dried for 2 hours at 105℃)%≤2.5GB/T 20020
Silica Content(Based on ignited material)%≥99.8GB/T 20020
Tamped Density(Based on material dried at 105℃ for 2 hours)g/dm³40~60GB/T 20020
Carbon Content (Based on material dried at 105℃ for 2 hours)%0.6~1.2GB/T 20020

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