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Designed for premium wood and coil coatings. Delivers excellent clarity, smooth touch, and long-term anti-settling stability.
To balance extreme clarity and matting efficiency, the GMATT 200 Series offers gradient particle sizes (4.0–9.5 µm). Select the ideal grade based on your target Dry Film Thickness (DFT).
Typical properties for the GMATT 200 Series. Backed by advanced gel-process technology for high pore volume and stability.
| Parameter | Typical Value | Unit |
|---|---|---|
| Pore Volume | ≥ 1.8 | ml/g |
| Oil Absorption | 210 - 260 | g/100g |
| Loss on Drying (2h @ 105°C) | ≤ 5.0 | % |
| Loss on Ignition (2h @ 1000°C) | ≤ 9.0 | % |
| pH Value (5% aqueous) | 6.0 - 8.0 | - |
| SiO₂ Content (dry basis) | ≥ 99.0 | % |
| Surface Treatment | Organic Wax | - |
* Typical values only. Not for sales specifications. Refer to COA for batch data.
Formulation advice and technical solutions from our R&D engineers.
The typical addition level ranges from 3% to 8% based on the total formulation weight, depending on your target gloss level (e.g., dead matte vs. satin) and the resin system. We highly recommend conducting a step-ladder test to determine the exact dosage required for your specific Dry Film Thickness (DFT).
Wax-treated silica (like our GMATT 200 & 300 Series) is engineered to prevent hard caking during long-term storage. The wax coating provides steric hindrance, ensuring that any settled particles form a soft, easily re-dispersible sediment. It also enhances the mar and scratch resistance of the final coating.
Our synthetic amorphous silica features a highly controlled pore volume and narrow particle size distribution. It can be easily incorporated using a standard high-speed dissolver (e.g., cowles blade) at low shear forces (1500-2000 RPM for 15-20 minutes). Grinding via bead mills is not required and should be avoided to prevent destroying the matting efficiency.
For low-viscosity systems like UV curable coatings or deep-penetrating wood primers, hard settling is a common issue. We recommend using our specially treated grades (such as the GMATT 300 Series) which offer superior suspension behavior. Additionally, pairing the matting agent with an appropriate rheology modifier (like our Fumed Silica) can create a stable thixotropic network.
Matching the average particle size (d50) to your Dry Film Thickness (DFT) is critical. If the particle size is too large for a thin film, it causes surface roughness and white spots (hazing). If it is too small, it gets buried in the resin, reducing matting efficiency. Use our GMATT 240/245 and 255/260 (4.0–6.5 µm) for high-clarity thin films, and GMATT 285/290 (8.5–9.5 µm) for heavy-duty thick films.
Download the full Technical Data Sheet (TDS) and Safety Data Sheet (SDS), or request a complimentary 500g lab sample for your formulation.