GMATT WB Series

Key Features

Zero Agglomeration (No Seeding): Proprietary hydrophilic-compatible treatment completely eliminates the risk of hard particles or "seeding" in water phase.
Ultra-High Efficiency: Extremely high pore volume (≥2.0 ml/g) delivers target dead-matte finishes at significantly lower dosages.
Rapid Wetting: Designed to wet out quickly in aqueous resins, drastically reducing micro-foam generation during dispersion.
PUD & Acrylic Compatible: Optimal refractive index matching ensures zero hazing in highly demanding waterborne wood clear coats.

Applications

High-end Waterborne Wood Coatings (Clear & Pigmented)
Waterborne Industrial & Metal Finishes
Waterborne Leather Finishes & Topcoats
Eco-friendly / Zero-VOC Architectural Coatings

GMATT WB Series: Grade Selector

Waterborne clear coats are highly sensitive to particle size mismatch. Select between the ultra-fine W450 and the universal W550 based on your target Dry Film Thickness (DFT) to ensure maximum clarity and a perfectly smooth film.

GMATT W450 d50: 4.5 - 5.0 µm

Recommended DFT: < 15 µm (Thin Film)

The ultimate choice for ultra-thin waterborne wood clear coats and leather finishes. Provides unparalleled transparency and a highly refined, silky touch.

GMATT W550 d50: 5.5 - 6.0 µm

Recommended DFT: 15 - 25 µm (Medium Film)

The universal standard for waterborne furniture and general industrial coatings. Delivers the perfect balance between extreme matting efficiency and clarity.

💡 Formulator Tip: When formulating waterborne clear coats (especially over dark wood substrates), hazing is a primary concern. GMATT W450 is strictly recommended to maintain the natural depth of the wood grain without micro-roughness.

General Properties

Typical properties for the GMATT WB Series. Featuring ultra-high pore volume (≥2.0 ml/g) engineered specifically to maximize efficiency in water-based resin systems.

Parameter	Typical Value	Unit
Pore Volume	≥ 2.0	ml/g
Oil Absorption	210 - 260	g/100g
Loss on Drying (2h @ 105°C)	≤ 5.0	%
Loss on Ignition (2h @ 1000°C)	≤ 10.0	%
pH Value (5% aqueous)	6.0 - 8.0	-
SiO₂ Content (dry basis)	≥ 99.0	%
Surface Treatment	Special Treatment (WB Optimized)	-

* Typical values only. Not for sales specifications. Refer to COA for batch data.

Frequently Asked Questions

Formulation advice and technical solutions from our R&D engineers.

How to disperse silica matting agents properly in waterborne coatings?

Unlike solvent-based systems, waterborne resins are highly prone to micro-foam generation under high shear. Our GMATT WB Series is specially treated for rapid wetting. We recommend adding it during the let-down stage under moderate shear (1000-1500 RPM) for 15-20 minutes. Grinding via bead mills is completely unnecessary and will destroy the matting efficiency.

Why do some matting agents cause "seeding" or agglomeration in water-based paints?

Seeding (hard particles in the film) usually occurs when a standard matting agent's surface treatment is incompatible with the water phase or the formulation's surfactants. The GMATT WB Series utilizes a proprietary hydrophilic-compatible special treatment that guarantees flawless dispersion and zero agglomeration, ensuring a perfectly smooth dry film.

How much matting agent to add for water-based polyurethane (PUD) or acrylics?

Because the GMATT WB Series features an ultra-high pore volume (≥2.0 ml/g), you generally need less material compared to standard grades to achieve the same gloss reduction. Start with a dosage of 2% to 5% based on total formulation weight. Always conduct a step-ladder test to pinpoint your specific target gloss.

Does the WB series affect the viscosity or pH stability of waterborne resins?

No. The GMATT WB Series maintains a neutral pH range (6.0 - 8.0) and is chemically engineered to have minimal impact on the rheology of sensitive waterborne acrylics, PUDs, and emulsions. It maintains stable viscosity and gloss levels even during extended shelf storage.

Ready to Test GMATT® WB Series?

Download the full Technical Data Sheet (TDS) and Safety Data Sheet (SDS), or request a complimentary 500g lab sample for your formulation.

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