Matting Agent Alternative
SYLOID® 621 / 622 alternative: Vistamatt Vista-391C
Looking for a Grace SYLOID® 621 / 622 alternative? Vistamatt Vista-391C is matched on particle route and application for industrial & metal (thick film), backed by TDS/SDS/TSCA documentation and free samples.
Specification comparison
| Property | SYLOID® 621 / 622 (Grace) | Vistamatt Vista-391C |
|---|---|---|
| Chemical basis | Amorphous silica | Synthetic amorphous silica (CAS 7631-86-9) |
| Type | Untreated, large particle size, medium pore volume | Synthetic silica matting agent |
| Particle size D50 | large | 9.0-9.5 µm |
| Recommended dosage | typ. 2-6% | 2-4% (system-dependent) |
| Applications | thick-film systems, anti-skid, powder and radiation cure | industrial & metal (thick film) |
SYLOID® 621 / 622 data from public technical datasheets; trademarks belong to Grace. Comparison for cross-reference only.
Matching conclusion
Both coarse-particle silicas for thick-film and high-build systems needing efficient matting. Vista-391C matched on the coarse route for industrial and metal thick-film coatings.
Vistamatt matches on the particle route and application rather than claiming an identical product. Qualify a replacement by screening Vista-391C against your current SYLOID® 621 / 622 control at matched gloss, holding dispersion, film build and cure constant.
Frequently asked questions
Is Vista-391C a direct replacement for SYLOID® 621 / 622?
Vista-391C is matched to SYLOID® 621 / 622 on particle route and application, not sold as an identical drop-in. Both are amorphous silica matting agents for industrial & metal (thick film). Qualify by screening Vista-391C against your current SYLOID® 621 / 622 control at matched gloss.
How do the particle sizes compare?
SYLOID® 621 / 622 runs at a large particle profile; Vista-391C is 9.0-9.5 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?
SYLOID® 621 / 622 is typically used at typ. 2-6% on total formulation. Vista-391C starts at 2-4% for most systems. Confirm by screening at matched gloss, not matched loading.
Can I get a sample to test against SYLOID® 621 / 622?
Yes. Vistamatt provides free 200-500 g samples (freight collect), shipped with a screening plan matched to your system. Send your resin system, target gloss, application method and film build.
Test Vista-391C against your SYLOID® 621 / 622 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.