Manufacturer

Acosorb

Acosorb (Acosorb GmbH, Bocholt) develops and applies seamless acoustic spray and trowel plasters (acoustic plaster). The jointless wall and ceiling surfaces absorb sound and reduce reverberation while staying visually closed, with no visible joints, grids or cassettes. The spray plasters (Acospray range) are made of enriched, partly recycled cellulose fibres with a water-based binder and are applied in several cross-sprayed layers; Acoplaster F combines a non-combustible mineral-wool board with an acoustic-plaster top layer. Depending on layer thickness and build-up, absorption reaches up to the highest absorption class A. The materials are open to diffusion and hygroscopic (usable down to swimming pools and semi-outdoor areas), Cradle to Cradle Bronze certified and documented via an ISO 14025 EPD (MRPI) and Fraunhofer VOC verifications. Member of the DGNB. Reference projects in Germany and the Netherlands.

Website

Manufacturer page

Green Line

Name: Green Line
Brand: Acosorb

Acosorb Green Line

WallCeiling

Description

The Acosorb Green Line is the most sustainable version of the Acospray range: an acoustic spray plaster made from 100 % post-consumer recyclate (recycled cellulose fibres). Available in the recyclate shades Apple Grey, Billboard Grey, Hong Kong Grey and India Yellow. Acoustically the Green Line matches its respective base spray plaster. The absorption values stored here are those of the DC3 base (coarse-grained spray texture, 10–50 mm); for the fine DC2 versions (India Yellow, Hong Kong Grey) the DC2 values apply.

Technical data

Material: Acoustic spray plaster made from 100 % post-consumer recyclate (recycled cellulose fibres) and a binder

Surface: open-to-diffusion spray texture (DC3 base: coarse-grained; DC2 base: fine)

Up to fire class: Low flammability (B-s1,d0) per DIN EN 13501-1 — Efectis 1350-1:2018; borate-free version B-s2,d0

Application: seamless wall and ceiling surfaces with the highest recyclate content; also swimming pools and semi-outdoor areas

Certifications: Cradle to Cradle Bronze; ISO 14025 EPD (MRPI); VOC Fraunhofer DIN EN 16516; fire class B-s1,d0 (Efectis); no continuous smouldering (Kiwa EN 16733)

Colours: Apple Grey, Billboard Grey, Hong Kong Grey, India Yellow

Measurement data

Sound absorption

ISO 354 – reverberation chamber· 5 variants

αw

1.00

Frequency values

αp per ISO 11654

f (Hz)	125	250	500	1k	2k	4k
αp	0.30	0.75	0.95	1.00	1.00	0.95

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Absorber class: A

NRC: 0.95

Distance: Direct (no gap)

Compare		Value
	35 mm	αw1.00
	25 mm	αw0.75
	20 mm	αw0.60
	15 mm	αw0.55
	10 mm	αw0.45