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 Product: WIDOPERL-Lightweight Polymer Screed



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WIDOPERL-Lightweight Polymer Screed

WIDOPERL is a lightweight polymer screed used as a levelling and filling compound for roofs, balconies, terraces and other areas with an uneven surface, or where a gradient filler is required.

WIDOPERL is a rapid curing screed that can be made completely flat and “smoothed-out to nothing” with a walkable wearing course achieved the same day.

Five times lighter than a conventional cement screed, WIDOPERL is particularly useful for projects where weight loading is an issue.

The WIDOPERL lightweight polymer screed system consists of recycled foamed glass, and a single component, solvent free binding agent.

Key Benefits

  • Lightweight
  • Five times lighter than a conventional cement screed
  • Rapid curing – walkable the same day
  • Can be “smoothed-out to nothing”
  • Perfect for creating falls on roofs and other areas
  • Thermally insulating
  • Reduces footfall & impact noise
  • 3kN point loading
  • Cold applied – No heat required

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Product Information

WIDOPERL Lightweight Polymer Screed

The WIDOPERL Polymer lightweight screed is a quick-setting, levelling and equalising compound which quickly becomes walkable, for all irregular and uneven surfaces. Because of its low weight of approx.

340 kg/m³, it may also be used for filling structural components with critical static properties. The light weight screed can be applied down to 0,25mm (grain size).

WIDOPERL Polymer lightweight screed is made of foamed, recycled expanded glass, of grain size 0,25 –0,50 mm and a binder. The WIDOPERL pellets are mixed carefully with the 1-component WIDOPANbinder and placed between setting jigs, horizontallyor on a slope.

The main areas for outdoor applications are flatroofs, balconies, terraces, walkways, surfaces usedby vehicles, etc. Here, major irregularities or zones with conflicting gradients are levelled. WIDOPERL has approx. 3.8 N/mm² compressive strength. Special mixes may be used for lower loadings.

Indoors, uneven surfaces can be levelled and cavities can be filled. The areas filled are pressure resistant and low in weight, have good thermal insulation and improve impact noise values.

Recommended mixing ratio

For normally and heavily loaded balconies and ter-races with additional surface sealing.
20 liters WIDOPERL and 1 kg binder


The WIDOPERL-granulate is mixed with the 1-com-ponent WIDOPERL-Binding agent. The mixture should be stirred for at least 2 minutes, then filled in another bucket and stirred again for at least 2 min. The surface is primed with WIDOPAN-Primer. It is important that the primer does not cure before applicating the WIDOPERL since it needs to be applied “wet in wet”. First, strips are installed to define the slope. The finished mixture is then pulled off and evened over these strips. Since it is an open pored surface, a thin layer of WIDOCRYL-Filler should be applied to close the pores after the WIDOPERL is cured and before the waterproofing layer is applied.

At higher temperatures, the surfaces should be shaded and only up to 20 liters of the material should be mixed.

Further details, especially regarding hazard state-ments, security advices and measures in the event of fire can be found in the safety data sheet un-der sections 2, 4, 5, 6, 7 and 8.


Foamed, recycled expanded glass
(WIDOPERL) and 1-component PU binder

Grain size

0.25 – 0.50 mm (WIDOPERL)


3,9 kg/m² per cm layer thickness

(including binding agent)

Bulk density (WIDOPERL without binder)

340 kg/m³ +/- 10%

Thermal conductivity

0.07 W/mK

Curing time outdoors (at + 20°C)

Normally walkable after 8.0 hours, with a pressure equalisation layer after 4.0 hours

Working time

30 minutes at +20°C

Packaging unit

WIDOPERL 60 l per bag
Binder (1-component and solvent-free)
1 kg or 20 kg

Minimum working temperature


Maximum working temperature


Cleaning in fresh state



WIDOPERL has unlimited shelf life if kept dry.
If container is kept closed and storage temperature held constantly below + 25°C, the binder may be used for up to 6 months.

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