High-purity, untreated synthetic silica engineered for maximum dispersibility, exceptional rheology control, and ultimate reinforcement in industrial coatings, elastomers, and adhesives.
Grade Selection Matrix
Compare our hydrophilic fumed silica parameters to find the precise grade for your manufacturing needs.
Engineered for maximum dispersibility and high filler loading. As a premier hydrophilic fumed silica 150, it allows for significantly higher addition rates without excessive viscosity build-up.
Low Viscosity Build
With a 150 m²/g surface area, it provides minimal viscosity increase, allowing for high loading in liquid systems like defoamers.
Rapid Dispersion
Engineered for easy integration into polymer matrices with significantly lower shear requirements compared to 200+ grades.
Free-Flow Power
An exceptional anti-caking agent that maintains powder coating fluidity and prevents clumping during long-term storage.
Processing Consistency
Ensures stable extrusion rates in RTV silicone sealants while optimizing overall formula costs through higher loading capacity.
SemiSIL 200: Hydrophilic Fumed Silica 200
Our flagship technical alternative to global leading grades. This high-performance hydrophilic fumed silica 200 provides superior molecular stability, anti-sagging, and rheology control for coatings, sealants, and resins.
Thixotropy & Thickening
Creates a robust gel structure that breaks down under shear for improved viscosity control in adhesives and sealants.
Anti-Settling
Effectively prevents the sedimentation of heavy pigments and fillers in coatings during long-term storage.
Rubber Reinforcement
Significantly enhances tensile strength, elongation, and overall mechanical durability in silicone rubber formulations.
Thermal Insulation
Provides excellent high-temperature insulation properties while improving powder flowability and processing efficiency.
SemiSIL 300: Hydrophilic Fumed Silica 300
A high-purity additive engineered for maximum mechanical strength. SemiSIL 300 offers superior 3D network formation and unmatched optical clarity for high-end industrial formulas like HTV and printing inks.
Superior Reinforcement
The high surface area creates a powerful 3D network, acting as the ultimate reinforcement filler for HTV silicone rubber.
Extreme Thixotropy
Achieve exceptional sag resistance and stable vertical bead profiles even in highly liquid or low-viscosity resin systems.
Optical Clarity
The nano-scale primary particles ensure zero optical haze in transparent coatings, fine chemicals, and sensitive liquid formulations.
High Suspension Power
Strong hydrogen bonding prevents heavy pigments from settling, delivering sharp print definition for high-speed printing inks.
SemiSIL 380: Hydrophilic Fumed Silica 380
The highest surface area grade in our portfolio, designed for extreme rheology control. SemiSIL 380 provides the most efficient thickening and nano-abrasive precision available for high-tech applications.
Maximum Thickening Efficiency
The massive 380 m²/g surface area creates a highly dense 3D hydrogen-bonding network even at minimal formulation dosages.
Nano-Scale Abrasive Precision
With primary particles around 7nm, it is the preferred choice for CMP slurries, providing ultra-fine, scratch-free polishing.
Ultimate Optical Clarity
Ensures the lowest possible haze in transparent polymers and LSR (Liquid Silicone Rubber) for high-precision molded parts.
Surface Purity & Stability
Maintains chemical integrity in gel electrolytes and highly sensitive electronic/medical-grade applications with absolute sag resistance.
Technical FAQ: Hydrophilic Fumed Silica
What is the difference between Hydrophilic Fumed Silica 150, 200, 300, and 380?
The main difference is the Specific Surface Area (BET). Lower BET grades like hydrophilic fumed silica 150 offer rapid dispersion and lower viscosity impact, allowing for higher loading. Higher BET grades like hydrophilic fumed silica 380 provide maximum thickening efficiency, extreme transparency, and exceptional reinforcement.
Why choose SemiSIL 200 for coatings and sealants?
SemiSIL 200 is a universal high-performance hydrophilic fumed silica 200. It builds a reliable thixotropic gel network that prevents sagging in paints, stops pigment sedimentation, and improves the shelf-stability of RTV silicone sealants without excessive processing difficulty.
How does SemiSIL 300 improve HTV silicone rubber?
When used in elastomers, hydrophilic fumed silica 300 creates a powerful 3D network due to its high surface area. This results in superior mechanical properties, drastically boosting tear resistance and tensile strength while maintaining zero optical haze in transparent rubber.
What makes SemiSIL 380 ideal for CMP slurries and LSR?
With its massive surface area and ~7nm primary particles, hydrophilic fumed silica 380 acts as an ultra-fine abrasive for scratch-free semiconductor polishing (CMP). In Liquid Silicone Rubber (LSR), its extreme fineness guarantees maximum optical clarity and precision molding.
How do I achieve rapid dispersion with minimal viscosity build?
If your formulation (such as defoamers or heavily loaded plastics) requires high silica addition but cannot tolerate severe thickening, specify hydrophilic fumed silica 150. Its lower surface area requires significantly less shear energy to disperse compared to 200+ grades.
Request Free Samples & Technical Advice
Tell us about your formulation. Our technical team from the Anhui R&D Center will match you with the right grade and dispatch samples within 48 hours.
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