Matting a solventborne coating is routine. Matting a waterborne one is not: many silica matting agents that perform well in solvent systems turn hazy, hard to disperse, or settle out in waterborne resin systems.

IOTA FINE SIL 7300H was developed specifically for water-based paints. The product improves silica purity and adopts the gel method, with optimized production equipment and process, giving a better particle size distribution — extinction efficiency is higher, and film transparency is greatly improved. The refractive index of the matting powder is raised closer to that of the resin, so the powder disperses easily even under unfavorable conditions and adjusts gloss without clouding the film. A special surface treatment process gives the product good compatibility with various waterborne resins, achieving a good anti-settling effect in storage.

Main specifications (per official product page):

Why waterborne formulators pick it:

• Pore volume 1.8 ml/g + special surface treatment — the two parameters that decide matting efficiency and storage stability in water-based systems.

• Refractive index close to the resin: matte without haze, keep film clarity.

• Better particle size distribution from the gel route — higher extinction efficiency at the same loading.

• Anti-settling behavior protects shelf life of waterborne wood and industrial lacquers.

Related product: Matting agent for Water-based special