Matting Agent Alternative
OK 500 alternative: Vistamatt VS361C
Looking for an OK 500 alternative? Vistamatt VS361C is matched on particle route and application for industrial & deep-matte coatings, backed by TDS/SDS/TSCA documentation and free samples.
Specification comparison
| Property | OK 500 | Vistamatt VS361C |
|---|---|---|
| Chemical basis | Amorphous silica | Synthetic amorphous silica (CAS 7631-86-9) |
| Type | Wax-treated precipitated silica, medium PS | Synthetic silica matting agent |
| Particle size D50 | ~6.3 µm | 6.2-6.5 µm |
| Recommended dosage | 1.5-7% | 2-4% (system-dependent) |
| Applications | general coatings, PU systems, thin-layer, waterborne; low drying retardation | industrial & deep-matte coatings |
OK 500 data from public technical datasheets. Comparison for cross-reference only.
Matching conclusion
Both medium-particle wax-treated silicas for general and PU coatings with high matting efficiency. VS361C matched at the ~6.3 µm route for industrial and deep-matte systems.
Vistamatt matches on the particle route and application rather than claiming an identical product. Qualify a replacement by screening VS361C against your current OK 500 control at matched gloss, holding dispersion, film build and cure constant.
Evaluation positioning. Vistamatt VS361C is designed for evaluation in applications currently using OK 500, and offers comparable performance in the application described above when qualified at matched gloss. Published figures indicate a similar performance range based on internal testing; they are not a guarantee of equivalence in your formulation.
Reference notice. Grade codes are cited for technical reference only; Vistamatt and Longyan Vista Chemical Co., Ltd. are not affiliated with their manufacturers. Specifications quoted for competitor products are taken from their publicly available technical data sheets and are not independently verified by Vistamatt. This page compares published specifications; it does not report side-by-side performance testing. Suitability must be confirmed by screening in your own system.
Frequently asked questions
Is VS361C a direct replacement for OK 500?
VS361C is matched to OK 500 on particle route and application, not sold as an identical drop-in. Both are amorphous silica matting agents for industrial & deep-matte coatings. Qualify by screening VS361C in your own formulation against your current OK 500 control at matched gloss.
How do the particle sizes compare?
OK 500 runs around ~6.3 µm; VS361C is 6.2-6.5 µm (D50). Matching on particle route is the starting point; final selection depends on target gloss, film build and system.
What dosage should I start with?
OK 500 is typically used at 1.5-7% on total formulation. VS361C starts at 2-4% for most systems. Confirm by screening at matched gloss, not matched loading.
Can I get a sample to test against OK 500?
Yes. Vistamatt provides free 200-500 g samples (freight prepaid by Vistamatt), shipped with a screening plan matched to your system. Send your resin system, target gloss, application method and film build.
Test VS361C against your OK 500 control
Send your resin system, target gloss, application method and film build. We'll ship a free 200-500 g sample with a screening plan matched to your system.