The range · Spray
Acospray DC1
A binding agent and enriched cellulose fibre, sprayed in crosswise layers to the finest texture in the sprayed range. Applied in mass at 5–20 mm, or over a bonded mineral-wool base where the room needs the full absorption.
0.70NRC at 20 mm in mass
Class DISO 11654 · αw 0.60
5–20 mm in massApplied build range
100%Recycled cellulose fibre
When to specify it
Specify it when you want a sprayed finish with almost no visible grain.
- Workplace ceilings where the finish should disappear
- Retail and showroom soffits
- Rooms where a Class A result is needed but the grain must stay fine
Specification
| Grain | Finest spray, float finish |
| Build | 5–20 mm in mass or 40 mm over a bonded base: 3 mm adhesive + 30 mm panel + 7 mm spray |
| Absorption | NRC 0.70 at 20 mm in mass — αw 0.60, ISO 11654 Class D |
| Coverage | 2–3 kg/m² per 10 mm |
| Colour | White. Custom colour by pigmenting the adhesive. |
| 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:
- αw 1.00 is reached over a bonded 30 mm mineral-wool base, not in mass. Applied direct at 20 mm it is αw 0.60.
- Green plasterboard is the recommended substrate.
- Repairs with a 38 kg mini machine.
- Vacuum with a soft brush head, or dry-ice clean.
Colour
White. Custom colour by pigmenting the adhesive.
Colour photography: Acosorb International.
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 |
|---|---|---|---|---|---|---|---|---|---|
| 20 mm in mass | 0.07 | 0.29 | 0.69 | 0.84 | 0.92 | 0.97 | 0.70 | 0.60 | Class D |
| 35 mm over 30 mm mineral wool | 0.23 | 0.78 | 0.99 | 0.99 | 0.98 | 0.96 | 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.
Also in the range