The range · Spray
Acospray DC3
The highest absorption in the range and the only finish that reaches ISO 11654 Class A. The coarser grain does a second job: under grazing or directional light it holds shadow, so the ceiling still reads as a material surface rather than a flat plane.
When to specify it
Specify it when the room is hard, the volume is large, or the ceiling is meant to be seen.
- Atria, foyers and public halls
- Retail and showroom volumes
- Museums and galleries
- Vaults, domes and exposed services — it takes the geometry directly
- Any room where the acoustic target needs Class A
Specification
| Grain | Medium-fine spray structure |
| Build | 10–50 mm αw 0.45 at 10 mm rising to 1.00 at 35 mm |
| Absorption | NRC 0.95 at 35 mm — αw 1.00, ISO 11654 Class A |
| Coverage | 1.3–1.8 kg/m² per 10 mm |
| Colour | Eight standard colours. Custom colour by pigmenting the binder — a Nebius ceiling was matched to Farrow & Ball No. 70. |
| Fire — Australia | Group 1 to AS 5637.1 AWTA 25-004810 · tested on Acospray DC, grey, approx. 30 mm on 12 mm fibre cement |
| Fire — Europe | B-s1,d0 EN 13501-1 · Efectis · borate-free B-s2,d0 on request |
| Substrate | Clean, dry and airtight, primed with Acoprimer. Above 15 °C during application and while it cures. |
| Warranty | 5 years performance and adhesion (manufacturer) · 10-year workmanship (McPherson Coatings) |
Worth knowing:
- The only finish in the range that reaches ISO 11654 Class A.
- Grain holds shadow under grazing light.
- Produced in Green Line, the 100% post-consumer feedstock.
- Oman Grey is excluded from the Cradle to Cradle certificate only. Its recycled content is unaffected — it is named in the manufacturer’s 100% recycled declaration like every other colour.
Colour
Eight standard colours. Custom colour by pigmenting the binder — a Nebius ceiling was matched to Farrow & Ball No. 70.
Colour photography: Acosorb International. * Oman Grey is excluded from the Cradle to Cradle certificate (12297) only. Its recycled content is unaffected — it is named in the manufacturer’s 100% recycled declaration like every other colour in the range.
Performance by thickness
Absorption is a function of thickness.
Specify the thickness against the target, not the headline figure. Sound absorption coefficient by octave band, manufacturer-published.
| Applied thickness | 125 Hz | 250 Hz | 500 Hz | 1 kHz | 2 kHz | 4 kHz | NRC | αw | ISO 11654 |
|---|---|---|---|---|---|---|---|---|---|
| 10 mm | 0.12 | 0.19 | 0.44 | 0.80 | 0.81 | 0.99 | 0.55 | 0.45 | Class D |
| 15 mm | 0.14 | 0.26 | 0.64 | 0.95 | 0.95 | 1.04 | 0.70 | 0.55 | Class D |
| 20 mm | 0.19 | 0.32 | 0.77 | 1.03 | 1.00 | 1.02 | 0.75 | 0.60 | Class C |
| 25 mm | 0.23 | 0.49 | 0.92 | 1.06 | 1.02 | 1.01 | 0.85 | 0.75 | Class C |
| 35 mm | 0.32 | 0.73 | 0.97 | 1.02 | 1.00 | 0.94 | 0.95 | 1.00 | Class A |
Source: Acosorb published product data; αw rated to ISO 11654. Room performance is to be confirmed by the project's acoustic consultant against AS/NZS 2107 — these are material figures, not a room result.