Guangzhou Eric Wei Chemical Co., Ltd.
Guangzhou Eric Wei Chemical Co., Ltd.

HIFULL HB-615 Hydrophobic Fumed Silica

HIFULL HB-615 is a high-performance hydrophobic fumed silica modified with HMDS. It features strong hydrophobicity, stable thixotropy, efficient reinforcement and powder flow aid, designed for silicone rubber, coatings, adhesives and powder systems.

Features Of HIFULL HB-615 Hydrophobic Fumed Silica

  1. HMDS deep hydrophobic modification – uniform surface treatment, strong hydrophobic stability, hydrolysis and moisture resistance

  2. Balanced rheological control – stable thixotropy, anti-sagging and anti-sedimentation, improve construction quality

  3. Efficient elastomer reinforcement – greatly enhance mechanical strength, toughness and aging resistance

  4. High purity & low impurity – low impurity content, suitable for high-end electronic and transparent products

  5. Easy dispersion & processability – fluffy powder, fast wetting, good compatibility with various processes

Typical Applications Of HIFULL HB-615 Hydrophobic Fumed Silica

  1. Silicone rubber (HTV/RTV/LSR) – efficient reinforcement, improve mechanical properties and service life

  2. Paints & inks – anti-sedimentation and anti-sagging, improve film flatness and scratch resistance

  3. Adhesives & sealants – optimize rheology and bonding strength, enhance sealing reliability

  4. Powder coatings & toners – flow aid and anti-caking, improve processability and appearance

  5. Industrial defoamers – enhance defoaming efficiency and long-term stability

Specifications Of HIFULL HB-615 Hydrophobic Fumed Silica

BrandHIFULL
Product TypeHydrophobic Fumed Silica / Nano Silicon Dioxide
AppearanceWhite fluffy powder
ModifierHMDS (Hexamethyldisilazane)
SiO₂ Content≥99.8%
BET Surface Area140 ± 30 m²/g
Loss on Drying≤0.5%
Tap Density50–80 g/L
Primary Particle Size12–16 nm
pH Value5.0–8.0


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