Diathonite Acoustix

Diathonite Acoustix

Premixed plaster to be used for the construction of sound-absorbing coatings, acoustic insulation of façades and partition walls. Composed by cork, clay, diatomaceous earth and hydraulic binder.


4.70 kg/m²
Values for 1 cm thickness.

Tolerance: ± 10%.

(2.45 lb/ft2 value for 1 inch thickness)

Drying time


Value referred to a temperature of 23°C / 73.4°F and 50% relative humidity level.



20 kg / 44.09 lb paper bag

Diathonite Acoustix is a sound-absorbing and acoustic insulating premixed plaster made of cork, clay, diatomaceous earth and natural hydraulic lime. Diahtonite Acoustix is used for the acoustic correction of façades and partition walls, for the realization of acoustic sound-absorbing coatings, for the elimination of echo, the reduction of  reverberation and  of noises in the rooms.

In addition to the sound insulation and sound absorption features, Diathonite Acoustix has good characteristics of thermal insulation and high dehumidifying abilities.

Key benefits

  • Excellent sound absorption properties: it absorbs 70% of sound wave.
  • Reaction to fire: Euroclass A1.
  • High breathability. it avoids moulds and condensations.
  • It contributes to thermal insulation.
  • Very fast applicative system (application by plastering pump).
  • It can be applied even on bent or complex surfaces.
  • LEED mapping.
  • It does not crack on brick work beetween supporting pillars.
  • Excellent compression resistance.
  • It can be applied over old plasters.


Aspect: Powder

Components: One-component

Sound-absorption: 70%

Noise Reduction Coefficient (NRC): 0.60

Sound Absorption Average (SAA): 0.61

Theoretical soundproofing power (external wall realised with 5 cm Diathonite + 25 cm thermal block + 1.5 cm plaster): Rw = 59.0 dB

Soundproofing power once applied (partition wall realised with 2 cm Diathonite + 25 cm Poroton block + 2 cm Diathonite): R'w ≥ 51.0 dB

Thermal Conductivity: 0.083 W/mK

Thermal resistance: 0.12 m2K/W = 1.738 ft2 °F h/BTU

Breathability: μ=4

Compression resistance: 3.0 N/mm2

Density: 470(±30) kg/m³

Item Specifications

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