I905 walls

Acoustic renovation: Phono Spray I-905

The application of a polyurethane system with acoustic insulation features improves the overall acoustic insulation of the constructive solution.

One of those polyurethane systems with acoustic insulation properties is the Phono Spray I-905, applied by pouring mainly to fill-in cavities between partition walls in buildings.

Phono Spray I-905 System

Phono Spray I-905 is a thermo acustic two-component Polyurethane System comprising polyol, and isocyanate. The system is “in situ” injected obtaining open cell low-density rigid foams with excellent acoustic absorption properties.

Phono Spray I-905 system does not contain “Ozone Depleting Potential” blowing agents

Application advantages

  • Total suppression of acoustic and thermal bridges.
  • Good adherence to the substrate.
  • Fast access and transportation to any site without having to carry or store bulky products like other acoustic and/or thermal insulating materials.

This system provides an excellent adherence to all building materials (concrete, ceramic, laminate plaster, wood, etc.) always bearing in mind the substrate condition that should be clean, dry and dust and oil free.

How to use I-905 acoustic insulation system?

Begin to inject an approximate amount of Phono Spray I 905 depending on thickness (never longer than the foam cream time) at the bottom of a corner (hole A) until the foam goes through the said hole A.

Afterwards, proceed with the following injection of product in hole B. Subsequently, continue injecting all through the entire wall. Then, go forward to the top line and carry out as the previous operation at the interspersed injection points.

Finally, perform the same operation at the top holes; it is advisable that these are the closest to the ceiling as possible in order to achieve a complete and uniform application.

I 905 acoustic system

Example of application Phono Spray I-905 insulation system

The sound reduction index in case of laminated plaster partition-wall in adjacent neighbour’s homes is:

sound testA constructive solution has been implemented for partition walls in adjacent neighbour’s homes consisting of a double partition of laminated plaster plaque of 15 mm thickness; each plaque injected with Phono Spray I 905. Each module is 46 mm thickness and 600 mm wideness.

Is this system a good sound insulation system?

The sound absorption of Phono Spray I-905 was determined at different frequencies, according to standard UNE-EN 20354:1993, in a reverberating chamber.

Acoustic insulation test for airborne noise have been carried out according to UNE-EN ISO 140-3:1995 in a vertical restoration watershed face typical facade as well as in new type of laminated plaster partition walls.

The following table shows the results obtained as well as the sound absorption of a closed cell polyurethane foam for thermal insulation such as Poliuretan® S Spray.

Acoustic absorption test

Acoustic absorption test


Interested in this polyurethane system? You can download the guide of acoustic insulation solutions: