HIFULL HB-152 is hydrophobic fumed silica which is produced by hydrophilic fumed silica with specific surface area of 200m2/g after chemical post-treatment with DDS ( Dimethyldichlorosilane ).


RTV silicone rubber,especially RTV-T

Adhesives & Sealants

Coatings & Printing ink

Powder Coating


Good hydrohpobicity, thixotropy, thickening, transparency and reinforcement performance

Anti-settling and anti-sagging agent

Free flow aid and anti-caking aid for powders

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

Physical & Chemical Data

PropertiesUnitTypical ValueTesting Standard
Specific surface area(BET)m2/g160±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/dm²40~60GB/T 20020
Carbon Content (Based on material dried at 105℃ for 2 hours)%0.8~1.6GB/T 20020