Key Features
- Absolute Transparency: 100% free of wax treatments, guaranteeing zero hazing even in deep-color clear coats.
- Flawless Recoatability: Lack of organic surface modification ensures perfect inter-coat adhesion in multi-layer systems.
- High Matting Efficiency: Finely controlled pore volume yields maximum gloss reduction at minimal addition levels.
- Rapid Curing Compatibility: Ideal for high-temperature baking enamels where wax sublimation could cause surface defects.
Applications
- Coil Coatings & High-temperature Baking Enamels
- Leather Finishes & Thin-film Plastics
- Overprint Varnishes (OPV)
- Premium Wood Coatings (requiring extreme clarity)
GMATT 100 Series: Grade Selector
The GMATT 100 Series offers the widest particle size spectrum (from ultra-fine 3.0 µm up to 18.0 µm). Select the perfect match for your Dry Film Thickness (DFT) to avoid surface roughness or loss of efficiency.
| Grade | Spec | Recommended DFT | Notes |
|---|---|---|---|
| GMATT 130 / 135 d50: 3.0 – 4.0 µm | < 10 µm (Ultra-thin) | Extremely fine grades for leather finishes and OPV. Provides a highly transparent, silky touch. (130: High Oil Abs / 135: High PV). | |
| GMATT 140 | d50 4.0 – 4.5 µm | 10 – 15 µm (Very Thin) | Perfect for thin-film clear coats and plastic coatings. Delivers high clarity without compromising film smoothness. |
| GMATT 155 | d50 5.5 – 6.3 µm | 15 – 25 µm (Medium) | The versatile standard. Excellent for general industrial and coil coatings. Available in standard and high Pore Volume (PV) options. |
| GMATT 114 | d50 14.0 – 18.0 µm | > 40 µm (Extra Thick) | Extra-large particles designed for heavy-duty industrial coatings, textured finishes, and high-build primers. |
💡 Formulator Tip: Since the 100 Series is untreated, it provides the best clarity but may settle faster in low-viscosity systems. We recommend using it in higher-viscosity resins or pairing it with a rheology modifier (like fumed silica) to prevent hard caking.
General Properties
Typical properties for the untreated GMATT 100 Series. Produced under strict conditions to ensure high SiO₂ purity and consistent matting performance.
| Parameter | Typical Value | Unit |
|---|---|---|
| Pore Volume | 1.2 – 1.8 | ml/g |
| Oil Absorption | 220 – 370 | g/100g |
| Loss on Drying (2h @ 105°C) | ≤ 5.0 | % |
| Loss on Ignition (2h @ 1000°C) | ≤ 6.0 | % |
| pH Value (5% aqueous) | 6.0 – 8.0 | – |
| SiO₂ Content (dry basis) | ≥ 99.0 | % |
| Surface Treatment | None (Untreated) | – |
- Typical values only. Not for sales specifications. Refer to COA for batch data.
OEM Bulk Supply
Need FCL quantities (25 MT+) with private-label packaging? HMMAT 100 Series delivers the same untreated silica chemistry in full-container volumes with audit-ready ISO 9001 + REACH documentation.
Alternative Grades
Frequently Asked Questions
Formulation advice and technical solutions from our R&D engineers.
+When should I choose untreated silica over wax-treated matting agents?
Untreated silica (GMATT 100 Series) is mandatory when you need absolute maximum optical transparency (zero wax hazing), or when inter-coat adhesion is critical in multi-layer applications. It is also preferred in high-temperature coil coatings where wax sublimation might cause surface defects.
+How can I prevent hard settling when using untreated silica?
Because untreated silica lacks steric hindrance from wax, it may settle faster in low-viscosity systems. To counteract this, formulate with a slightly higher viscosity resin, or incorporate an anti-settling agent / thixotropic agent (such as our Hydrophilic Fumed Silica) to build a stable suspension network.
+How much silica matting agent should I add to my coating formulation?
The typical addition level ranges from 3% to 8% based on the total formulation weight. Untreated silica generally exhibits slightly higher matting efficiency per gram compared to wax-treated equivalents. We recommend conducting a step-ladder test to pinpoint your optimal dosage.
+How does the particle size (d50) of matting agents affect coating transparency?
Matching the average particle size (d50) to your Dry Film Thickness (DFT) is critical. The GMATT 100 series offers an extreme range. Use our ultra-fine GMATT 130/135 (3.0-4.0 µm) for very thin films like leather finishes, and the massive GMATT 114 (14-18 µm) strictly for thick-film or textured heavy-duty coatings.