Product Overview
Produced by flame hydrolysis of silicon tetrachloride, fumed silica A200 carries an extremely high specific surface area, typically around [ ] m²/g, which creates a three-dimensional network in liquid resins at low addition levels. A small percentage changes a free-running resin into a non-sag thixotropic system that still levels when brushed, rolled, or sprayed. It is compatible with epoxy, polyester, and vinyl ester systems and also acts as a matting agent and anti-settling aid in filled compounds. The powder is supplied in sealed packages that keep it dry until use.
Fumed silica A200 is a hydrophilic, amorphous silicon dioxide powder used as a thickening and thixotropic agent for resin systems. Added to laminating resin, gel coat, adhesive, or infusion resin, it builds viscosity and stops sagging and filler settling while the material is still liquid. Formulators specify it when they need controlled flow behavior without changing cured properties.
Specifications
| Parameter | Typical Value |
|---|---|
| Specific surface area (BET) | [ ] m²/g |
| pH (4% dispersion) | [ ] |
| Loss on drying | [ ] % |
| SiO₂ content | [ ] % |
| Tamped density | [ ] g/L |
| Particle size | [ ] nm |
| Packaging | [ ] kg/bag |
Values vary by grade — contact sales for the datasheet.
Applications
Thicken laminating and infusion resins
Hold resin on vertical surfaces and control flow fronts.
Stop sag in gel coats and adhesives
Keep coatings on overhead and vertical areas.
Prevent settling in filled compounds
Stabilize fillers and pigments in storage and use.
Control resin bleed in core bonding
Manage viscosity in paste and gap-filling systems.
Key Advantages
Versus alternative thickeners, A200 delivers thixotropy at low addition levels with minimal effect on cured mechanical properties, and it works across polyester, epoxy, and vinyl ester chemistries, so one powder covers multiple formulations. The fine-particle network also improves edge holding and leveling. Purchasing from Cinon Composites means consistent grade quality and packaging sized for production-scale dosing.
FAQ
What addition level do I need?
Start around [ ] % by weight of resin and adjust for target viscosity; the Cinon Composites technical team can suggest a starting point.
Does A200 affect cured strength?
At typical thickening levels the effect on cured properties is minimal; verify with mechanical testing for structural grades.
How should the powder be stored?
Keep packages sealed and dry — moisture uptake degrades dispersibility, so store in a dry area and reseal after use.
— Cinon Composites Technical Team
