Engineered for Heavy Film Builds at 30–80 µm DFT
Industrial baking enamels are characterised by heavy film builds that demand more from a matting agent than standard clear-coat grades can deliver. GMATT 300 is a specially modified silica grade — distinct from the wax-treated GMATT 200 Series — developed specifically for medium-to-heavy DFT industrial systems (30–80 µm). At 3.0–6.0 wt% loading in alkyd-melamine, polyester-melamine, and epoxy stoving systems, GMATT 300 achieves 60° gloss targets of 10–40 GU with a flatter extinction curve across the DFT range, eliminating the gloss variance caused by film thickness variations during production-line application.
Anti-Caking in Solvent-Poor, Low-Viscosity Systems
High-solids industrial baking enamels (solids 60–75%) and acid-catalysed systems present a challenging environment for silica matting agents. Low viscosity provides minimal hydrodynamic support for suspended particles, while high solids concentrations increase the probability of inter-particle contact. GMATT 300's special surface modification creates controlled steric and electrostatic barriers between silica particles at the high-solids concentrations typical of energy-efficient industrial baking formulations. The result: storage stability without hard settling, clean pouring at the end of shelf life, and consistent gloss development on the production line.
Compatibility Across Epoxy, Alkyd-Melamine, and Polyurethane Industrial Systems
GMATT 300 is verified compatible with the core industrial baking enamel chemistries:
- Alkyd-melamine and polyester-melamine baking systems (cure at 120–160°C)
- Epoxy-amine and epoxy-phenolic stoving coatings (cure at 150–180°C)
- 2K polyurethane industrial coatings (HDI/IPDI, ambient or force-dry)
- Acid-catalysed high-solids alkyd systems
In all systems, the surface modification is thermally stable through the baking window, and GMATT 300 does not interfere with the crosslinking chemistry or accelerate substrate corrosion in immersion service.
Supply Chain for Industrial Paint Manufacturers
Industrial paint manufacturers require supply partners who understand production constraints: consistent particle size specification, predictable viscosity impact, and multi-tonne FCL supply with batch traceability. SEMITECH delivers GMATT 300 with locked d50 and oil absorption specifications, CoA and SDS per shipment, and lead times of 15–25 days for repeat orders. For OEM bulk requirements, refer to HMMAT 200 Series for cross-reference supply options.
When to Use GMATT 300 for Industrial Coatings
GMATT 300's specially modified surface makes it the preferred grade when DFT exceeds 30 µm, binder solids exceed 60%, or the system is low-viscosity and prone to silica hard-settling in storage.
| Scenario | Recommended Grade | Target DFT | Loading |
|---|---|---|---|
| Alkyd-melamine industrial baking enamel | GMATT 300 | 35–60 µm | 3.0–5.0 wt% |
| Epoxy industrial floor & machinery coating | GMATT 300 | 50–80 µm | 3.5–6.0 wt% |
| 2K PU heavy-duty industrial topcoat | GMATT 300 | 40–60 µm | 4.0–6.0 wt% |
| High-solids acid-catalysed alkyd | GMATT 300 | 30–50 µm | 3.0–4.5 wt% |
| Standard-DFT industrial system | GMATT 270 / 285 | 20–40 µm | 2.5–4.5 wt% |
Technical FAQ
GMATT 300 industrial coating formulation questions covering baking enamels, epoxy systems, and heavy-duty PU.
+What makes GMATT 300 suitable for baking enamel systems at 40–80 µm DFT?
GMATT 300 is specially modified for heavy film builds of 30–80 µm DFT, where standard wax-treated grades can cause optical haze or insufficient gloss reduction. Its medium-to-large particle size range and surface modification provide efficient gloss reduction at 3.0–6.0 wt% loading in alkyd-melamine baking enamel, epoxy stoving, and thermosetting PU industrial systems without requiring elevated dispersion energy.
+How does GMATT 300 prevent anti-caking in low-viscosity solvent-poor industrial systems?
Low-viscosity industrial coatings — high-solids alkyd and acid-catalysed systems — provide minimal hydrodynamic suspension for silica particles, making anti-caking critical. GMATT 300's special surface modification creates controlled electrostatic and steric repulsion between particles, maintaining a dispersed state at solids concentrations up to 45% without requiring auxiliary dispersants. The result is a system that pours cleanly, brushes uniformly, and settles only softly during extended storage.
+Is GMATT 300 compatible with alkyd-melamine baking systems?
Yes. GMATT 300 is fully compatible with alkyd-melamine, polyester-melamine, and acid-catalysed baking enamel systems cured at 120–180°C. The surface modification is thermally stable through the baking window, and the silica does not interfere with the melamine crosslinking reaction or accelerate yellowing of the alkyd resin. Typical loading is 3.0–5.0 wt% for 60° gloss targets of 15–40 GU.
+What gloss targets does GMATT 300 achieve in epoxy industrial coatings?
In 2K epoxy industrial coatings at 50–80 µm DFT, GMATT 300 at 3.5–6.0 wt% achieves 60° gloss targets from 10 GU (deep matte) to 40 GU (satin). The heavy film build provides a wide optical depth for the matting mechanism, allowing lower loading relative to thin-film grades at equivalent gloss reduction. Formulators can fine-tune the matte depth without affecting film mechanical properties.
+Can GMATT 300 be used in polyurethane industrial coatings for metal substrates?
Yes. GMATT 300 performs well in both 2K polyisocyanate (HDI, IPDI) and 1K moisture-curing polyurethane industrial coatings applied to metal, concrete, and composite substrates. In 2K PU industrial systems at 40–60 µm DFT, loading of 4.0–6.0 wt% achieves 60° gloss of 10–30 GU with good hardness development and chemical resistance. The anti-caking function of GMATT 300 is particularly valuable in spray-applied 2K PU where Part A shelf life is measured in months.
Recommended Solution
For heavy industrial baking enamel, epoxy, and 2K PU systems at 30–80 µm DFT, specify GMATT 300 Series — specially modified silica with anti-caking in solvent-poor systems and consistent gloss reduction across heavy film builds.
SEMITECH matrix · co-purchase