Technical datasheet for NEXTEL Velvet-Coating 811-21, a black matte anti‑glare topcoat with specifications, application guidelines and safety information.
NEXTEL Velvet‑Coating 811‑21 is a special black topcoat designed to create matte, completely anti‑glare surfaces. It provides diffuse scattering of 98 % of incident light, a dull‑matte gloss with reflectance ≤ 2/85°, and good resistance to condensate, temperature, shock and impact.
The coating is supplied ready‑to‑use, with a recommended dry film thickness of 45‑55 µm and a theoretical coverage of 436 m² per litre. It can be applied by compressed‑air spraying, requires pre‑treated substrates, and is accompanied by extensive safety and handling instructions, including storage temperature limits (5‑35 °C) and flash point (31 °C).
| Diffuse scattering | 98 % of irradiated light |
|---|---|
| Gloss / reflectance | dull matte, ≤ 2/85° |
| Theoretical coverage area | 436 m² per 1 l |
| Recommended dry film thickness | 45‑55 µm |
| Storage temperature | 5 °C – 35 °C |
| Flash point | 31 °C |
| Boiling point | ≈ 120 °C |
| Density | 0.93 g/cm³ at 20 °C |
The recommended dry film thickness is 45 – 55 µm.
The flash point is 31 °C.
One litre can theoretically cover 436 m².