Gel-Type Grades: GMATT 100 & 200 Series
The GMATT 100 and 200 series are synthetic silica gel matting agents offering the broadest particle size and porosity options in the portfolio. The 100 series (untreated) covers d50 values from 3.5 µm to 11 µm with oil absorption ranging 200–280 ml/100 g, making them the default choice for solventborne clear coats and pigmented industrial finishes. The GMATT 200 series adds organic surface treatment (wax or silicone) to reduce viscosity impact by 15–25% at equal loading, which matters in high-solids formulations above 65% NV where untreated grades can push Stormer viscosity out of spec.
Precipitated & Specialty: GMATT 300 & 600 Series
Precipitated silica grades in the GMATT 300 series deliver cost-effective matting for architectural and decorative coatings where raw material budgets are tight. With oil absorption at 180–220 ml/100 g and d50 of 5–9 µm, they reach 20–35° gloss (60°) at 3–5% loading in waterborne emulsions. The GMATT 600 series targets premium waterborne wood coatings requiring ultra-smooth feel — precipitated grades with narrow particle distribution (d50 4.5 ±0.5 µm) and BET surface area of 300–450 m²/g produce satin finishes without the haze that coarser grades introduce above 2% loading.
UV & Energy-Cure: GMATT UV Series
The GMATT UV series is engineered for 100%-solids UV and EB-cure systems where conventional matting agents settle or cause curtain-coat defects. Surface-treated with acrylate-functional silane, these grades maintain dispersion stability in reactive diluents like TPGDA and HDDA for 48+ hours at 25 °C. Particle sizes run 3–6 µm with a tight top-cut (d98 <15 µm) to prevent nozzle blocking in roll-coat and curtain-coat lines. Typical loadings of 2–4% achieve 15–30° gloss (60°) without measurably increasing cure dose requirements.
How to Request a TDS
Submit your email and select the grades you need — TDS documents are delivered as PDF within one business day. Each data sheet includes particle size distribution (laser diffraction), oil absorption (spatula rub-out), BET surface area, bulk density, moisture content, pH, and recommended loading ranges by resin system. Application notes with gloss curves at 2–6% loading in specific binder families (acrylic, alkyd, PU, UV-acrylate) are included where available. Bulk sample requests (1–25 kg) can be made alongside the TDS download.
Quick-Reference Grade Comparison
The table below summarizes key specs across the most-requested GMATT grades. Use it to shortlist candidates before downloading full TDS documents.
| Grade | Type | d50 (µm) | Oil Abs. (ml/100g) | Target Gloss 60° | Best For |
|---|---|---|---|---|---|
| GMATT 103 | Gel (untreated) | 6.5 | 250 | 10–20° | Solventborne industrial |
| GMATT 105 | Gel (untreated) | 3.5 | 280 | 5–15° | High-end wood lacquer |
| GMATT 202 | Gel (wax-treated) | 7.0 | 230 | 15–25° | High-solids clear coat |
| GMATT 203 | Gel (silicone-treated) | 5.5 | 240 | 10–20° | Anti-scratch furniture |
| GMATT 302 | Precipitated | 7.5 | 200 | 25–35° | Architectural emulsion |
| GMATT 601 | Precipitated (fine) | 4.5 | 210 | 20–30° | Waterborne wood |
| GMATT UV-01 | Gel (acrylate-treated) | 4.0 | 260 | 15–25° | UV roll coat |
| GMATT UV-03 | Gel (acrylate-treated) | 5.5 | 245 | 20–30° | UV curtain coat |
Frequently Asked Questions
Common questions about resources.
+What information is included in a GMATT TDS?
Each TDS covers particle size distribution (d50, d98), oil absorption, BET surface area, bulk density, moisture, pH, and recommended loading ranges by resin type. Most sheets also include gloss-versus-loading curves for common binder families.
+How quickly are TDS documents delivered?
TDS PDFs are typically delivered within one business day of submitting your request. Urgent requests during business hours are often fulfilled within a few hours.
+Can I request physical samples along with the TDS?
Yes, bulk sample requests from 1 kg to 25 kg can be submitted alongside TDS downloads. Samples ship from regional warehouses and usually arrive within 5–7 business days depending on location.
+What is the difference between gel-type and precipitated matting agents?
Gel-type silica (GMATT 100/200) has higher porosity and oil absorption, producing lower gloss at lower loadings — ideal for industrial and wood coatings. Precipitated silica (GMATT 300/600) is more cost-effective with moderate matting efficiency, suited to architectural and decorative applications.
+Which GMATT grade works best for UV-curable coatings?
The GMATT UV series is purpose-built for UV and EB-cure systems. Acrylate-functional surface treatment prevents settling in reactive diluents, and tight top-cut (d98 <15 µm) avoids nozzle blocking on roll-coat and curtain-coat lines.
+How do I choose the right particle size for my formulation?
Finer grades (d50 3–5 µm) deliver deeper matting and smoother feel but increase viscosity. Coarser grades (d50 7–11 µm) mat efficiently at lower viscosity cost but may introduce micro-texture. Match particle size to your film thickness — d50 should not exceed 60% of dry film thickness to avoid surface protrusion.
Request TDS documents for any GMATT grade to get full particle size distributions, loading curves, and application notes — everything a formulator needs to shortlist and trial the right matting agent.