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

Tokuyama REOLOSIL QS-10LS Hydrophilic Fumed Silica

Tokuyama REOLOSIL QS-10LS is a hydrophilic fumed silica imported from Japan. It features low specific surface area, low viscosity and low turbidity, focusing on precise rheology control and efficient reinforcement, suitable for coatings, sealants and silicone rubber.


Features Of Tokuyama REOLOSIL QS-10LS Hydrophilic Fumed Silica

  1. Low turbidity and high transparency – suitable for transparent formulations, no impact on clarity, improve product appearance

  2. Low viscosity and easy control – precisely adjust liquid thixotropy, prevent sagging and sedimentation without excessive thickening

  3. High-efficiency reinforcement – enhance mechanical properties of silicone rubber and sealants, improve adhesion and durability

  4. Easy dispersion – fluffy white powder, convenient to add, reduce processing energy consumption and difficulty

  5. Multi-functional adaptability – anti-caking, flow aid and carrier functions, suitable for various high-end formulations

Typical Applications Of Tokuyama REOLOSIL QS-10LS Hydrophilic Fumed Silica

  1. Coating systems – water-based/UV coatings, unsaturated polyester coatings, thickening, thixotropy and anti-sagging

  2. Sealants/adhesives – thickening and reinforcement, prevent filler sedimentation, improve bonding strength

  3. Silicone rubber products – reinforcement for HCR-RTV-2K silicone rubber, enhance tensile, tear strength and insulation

  4. Printing inks – prevent sedimentation, thickening, endow good colorability and water resistance

  5. Powder products – anti-caking and flow aid, improve storage and processing performance

Specifications Of Tokuyama REOLOSIL QS-10LS Hydrophilic Fumed Silica

Product TypeHydrophilic Fumed Silica (Amorphous Silica)
AppearanceFluffy white powder
SiO₂ Content (dry basis)>99.9%
BET Surface Area110–150 m²/g
Primary Particle SizeApproximately 16 nm
pH Value (4% suspension)4.0–4.5
Moisture Content<1.5%
Bulk DensityApprox. 50 g/L
44μm Sieve Residue<0.01%



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