Sheep's wool insulation

ISOLENA Window Filler

Density: 30 g/rm and 30 kg/m³
Anwendung: Window- and Joint Insulation, Doors Wooden Construction

Our ISOLENA Window Filler sheep's wool insulation is made of 100% wool and is renewable, durable, recyclable and manufactured without synthetic additives.

  • The loose wool fibres are aligned and processed into a wool fleece (=carded) to make the window filler. The wool strand bound with two twisted threads for stabilisation.
  • The carded wool bands are suitable for insulating and filling hollow spaces in window and door frames, as well as roof windows in the roofing frame.
  • For the correct installation, fill in the window filler
    with a scraper. Thanks to the high filling volume, the hollow spaces are ideally insulated as the sheep wool fills up any hollow spaces.

Form of delivery

We offer the ISOLENA window filler as follows:

  • Art-Nr.: 150028
  • Length: 200000 mm
  • Item/PU: 12 items
  • kg/PU: 6,00 kg
  • Form of delivery: 1 piece, set of 12 or pallet with 2 x set of 12 (0,40 ldm)

Technical data

European technical approval ETA-07/0214 Download
Nature Plus® 0103-1006-099-1 Download
Thermal conductivity λtr 0,033 W/mK  
Vapour diffusion resistance factor μ 1  
Specific heat capacity c 1760 J/kgK  
Fire behaviour according to EN 13501-1 D-s2, d0; CH: RF3  
Mould growth intensity according to EN ISO 846 0  
Sound reduction index Rsw(C; Ctr) ≥ 62 (-2; -5) dB  

Ecological parameters

ISOLENA insulation materials have the following ecological parameters according to the NaturePlus® life cycle analysis report:

  • Use of non-renewable primary energy without the non-renewable primary energy carriers used as raw material (PENRE
    [MJ, lower calorific value]):  23,44 MJ/kg
  • Global warming potential Total of GHG emissions and CO2 storage (GWP 100 total): 0,83 kg CO2-equiv./kg
  • Acidification potential of soil and water (AP): 4,63E-03 kg SO2-equiv./kg
  • Potential for the formation of tropospheric ozone (POCP): 8,04E-04 kg C2H4-equiv./kg
  • Eutrophication potential (EP): 2,08E-03 kg PO4³-equiv./kg

IONIC PROTECT® Wool protection

IONIC PROTECT® is a biocide-free process developed by ISOLENA and protected by a trademark patent to protect wool.

Plasma ion treatment of the wool fibres protects them from all negative influences that can occur in construction. This gives moths and insects no chance to thrive. In addition, our products can be stored indefinitely thanks to the wool protection.

We present you with these terms in writing with the ECO/CUAP test report ECO-P16002-15017 and our product promise.



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  • Child's play processing
  • Time factor = 1:1, compared to conventional foams
  • No drying time, no re-cutting and reworking
  • Can be applied at any temperature and humidity
  • Advantage when reworking the trades in dry construction, soffit tapes are not damaged, a clean connection is given

You can find more details on the advantages and disadvantages, as well as the processing of our sheep's wool joint tape in the magazine article "Custruction Foam Alternative".

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