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Matting Agent for Coatings: Wood, UV & Industrial Lacquers
Matting Agent Coatings & Paints 2026
Matting Agent for Coatings:
Wood, UV & Industrial Lacquers
Silica-based matting agents give formulators precise control over surface gloss — from high sheen to deep matte — without sacrificing film clarity, hardness, or chemical resistance. This guide covers dosage, grade selection, and system-specific recommendations.
Contents
- How It Works
- Wood & Furniture
- UV-Curable Systems
- Industrial Coatings
- Formulation Tips
- Grade Guide
- Related Products
- FAQ
Quick Specs
Gloss (60°)5–85 GU
Particle Size (d50)3–12 µm
Typical Dosage3–8%
BET Surface Area250–600 m²/g
Moisture≤6%
How Matting Agents Control Gloss
Silica matting agents work by creating a controlled micro-rough surface on the dried coating film. As the film solidifies, silica particles protrude slightly above the surface, scattering incident light in multiple directions instead of reflecting it specularly.
The resulting gloss level — measured at 60° in Gloss Units (GU) — is determined by three variables: matting agent particle size (coarser = more scatter), loading level, and applied film thickness. Thinner films concentrate the particles near the surface, giving more efficient matting per unit dose.
3–8%
Typical dosage range for most solvent-based and waterborne systems
5 GU
Deep matte achievable at 7–8% loading with coarse-grade silica
600 m²/g
Max BET surface area in ultra-fine treated matting grades
±2 GU
Batch-to-batch gloss reproducibility in premium grades
Wood & Furniture Coatings
Wood coatings represent the largest end market for matting agents, where satin and matte finishes dominate furniture lacquers, parquet coatings, and kitchen cabinet topcoats.
In nitrocellulose and polyurethane wood lacquers, wax-treated silica at 4–7% achieves target gloss values of 15–35 GU (60°) with excellent transparency and no cloudiness. Wax-treated grades additionally improve scratch and mar resistance in high-use furniture surfaces.
Furniture Lacquers (NC/PU)
Wax-treated silica at 4–7%; achieves 15–40 GU with improved scratch mar resistance and good transparency.
Parquet & Floor Coatings
Abrasion-resistant matting silica with narrow PSD for uniform gloss in high-traffic floor finish applications.
Waterborne Wood Coatings
Organically modified silica grades disperse readily in aqueous systems without foaming or settling issues.
Kitchen & Cabinet Topcoats
Chemical-resistant matting systems for surfaces exposed to cleaning agents, moisture, and heat cycling.
UV-Curable Systems
UV coatings cure in seconds under ultraviolet light, leaving little time for matting agent particles to migrate to the surface. This makes grade selection critical: fine-particle treated silica (d50 3–6 µm, surface-modified) gives reliable matting efficiency even in fast-cure UV floor and furniture coatings.
Important: Standard untreated matting silica is not recommended for UV systems — moisture sensitivity can cause haze and compatibility issues. Use wax-treated or organically modified grades such as our GMATT U800, or purpose-formulated UV silica dispersions.
For UV-curable wood coatings, target dosage is 4–6% of total formulation weight. Pre-disperse the silica in a portion of monomer or oligomer before addition to the main batch to avoid agglomerates that cause streaks and uneven gloss.
Industrial & Protective Coatings
In industrial coatings — including metal primers, automotive refinish clears, and marine topcoats — matting agents must survive aggressive chemical and mechanical exposure while maintaining a consistent matte or satin appearance.
| Coating Type | Target Gloss (60°) | Recommended Grade | Special Requirement |
|---|---|---|---|
| Metal topcoat (solvent) | 20–40 GU | Wax-treated, d50 5–8 µm | Corrosion resistance |
| Automotive refinish | 60–75 GU (satin) | Fine treated, d50 3–5 µm | DOI preservation |
| Marine antifouling | 10–30 GU | Coarse untreated | Biocide compatibility |
| Powder coating | 5–30 GU | Dry-process silica | Heat stability >200°C |
| Leather & textile finish | 5–25 GU | Organically modified | Flexibility, hand feel |
Formulation Tips
Dispersion: Add matting agent last in the let-down stage, after pigments and other additives are fully dispersed. High shear mixing for 10–15 minutes achieves adequate dispersion without particle breakage.
Film thickness: Gloss is sensitive to applied film thickness — thinner films give lower gloss at the same dosage. Define gloss target at a specific wet film thickness and hold that constant during production.
Stability: Matting agents can settle during storage. Use a high-speed stir before drawing samples. Anti-settling additives (e.g., fumed silica, organoclay) at 0.3–0.8% extend pot life and reduce hard settling.
Tip: For waterborne systems, pre-wetting silica with a small amount of water before adding to the grind improves wetting and reduces air entrainment.
Grade Selection Guide
| Grade Type | d50 Particle Size | Surface Treatment | Best For |
|---|---|---|---|
| Ultra-fine treated | 3–5 µm | Wax or organic | UV, automotive, high clarity |
| Standard treated | 5–8 µm | Wax | Wood lacquers, metal topcoats |
| Coarse treated | 8–12 µm | Wax | Deep matte, floor coatings |
| Untreated | 5–10 µm | None | Solvent systems, marine |
| Organically modified | 4–7 µm | Silane/organic | Waterborne, leather, textile |
Need application support? Browse our full matting agent range including the GMATT U800 UV-optimized grade. Contact Semitech for grade-specific TDS and formulation guidance.
Related Products
Matting Agent Range
Silica matting agents for solvent-borne, waterborne, and UV-curable coating systems.
Browse Products → GMATT U800
Wax-treated silica matting agent optimized for UV-curable wood and floor coatings.
View Product → Fumed Silica
Anti-settling and rheology additive for coatings and adhesive systems.
Browse Products → Frequently Asked Questions
How do silica matting agents work in coatings?
Silica particles dispersed in a coating protrude slightly above the film surface as it dries or cures, creating a micro-rough topography that scatters incident light in multiple directions instead of reflecting it specularly. The degree of gloss reduction depends on particle size, loading level, and film thickness.
What dosage of matting agent is typical for wood coatings?
For solvent-based and waterborne wood lacquers, dosage typically ranges from 3–8% by weight of total formulation to achieve 10–40 GU at 60°. Higher loadings risk haze formation, surface roughness, or reduced mechanical properties. Always validate by draw-down at target film thickness.
Can matting agents be used in UV-curable coatings?
Yes, but standard matting silica must be surface-modified for UV systems. Wax-treated or organically modified grades like GMATT U800 are recommended to prevent settling and ensure uniform gloss reduction after cure. Pre-disperse in monomer before adding to the main formulation.
Does adding matting agent affect coating hardness or scratch resistance?
At 3–7% dosage, impact on pencil hardness and scratch resistance is minimal. Wax-treated grades can actually improve mar resistance. At loadings above 8%, some softening of the film may occur. Using fine-particle grades at lower dosage generally preserves mechanical properties better than coarse grades at high dosage.
What is the difference between treated and untreated matting agents?
Untreated silica has bare silanol groups that absorb moisture and can cause settling in solvent-free systems. Treated grades — wax-treated, silane-modified, or organically coated — offer improved dispersibility, reduced moisture sensitivity, lower viscosity impact, and better compatibility with UV and waterborne coatings. See our matting agent range for available treated grades.
Technical data is indicative. Contact Semitech for grade-specific TDS and formulation application support. References current as of April 2026.