Adhesive mortar FLL Winter

Product description

Adhesive Mortar FLL Winter is a polymer-modified, cement-based mortar with a maximum grain size of 0.6 mm.


  • The adhesive mortar for the Fescoterm thin-layer plastering systems’ insulation panels in the temperature range -10 – +5°C


  • additional thermal insulation of old residential, commercial and industrial buildings, and thermal insulation of new buildings in winter conditions
The product is suitable for use on sites with a Nordic Swan Ecolabel.

Vinkki! Vieritä taulukkoa sivuttain
EAN code Product name Product number Package size
6416841640116 Adhesive mortar FLL Winter 64011 25 kg


Refer to the bag for how much water the plaster requires. Add the dry material to the water and mix with a power mixer or a drill paddle for around one to two minutes. Allow the mixture to stand for a while and mix it again for a short while. Find the correct consistency at this stage by gradually adding the rest of the water. We do not recommend adding all of the water right at the start. The finished plaster remains workable for around one hour.

Wash the old facade surface with a pressure washer to remove flaking paint and loose dirt. If necessary, remove flaking paint by scraping. Remove plastering that has come loose from its base and damaged concrete, and patch any cavities.

Apply adhesive plaster thoroughly to the insulation boards to be fastened using a toothed trowel. Then, press the insulation boards into the base, tightly against each other. No plaster or gaps must remain in the joints. The joints of the insulation boards must be staggered, and there must be no joints that cross each other. Finally, secure the fastening of the insulation board to the base using fastening plugs made from polyethylene plastic. Use at least 4 plugs per m². The fastening plugs are installed at the corners of the boards and evenly in their middles. After fastening, the facade surface must be level and the insulation boards undamaged.

Waste handling

Storage and handling of waste. See the separate storage and disposal instructions

Technical information

Material usage

4-5 kg/m²/layer

Water requirement 6-6.5 l/25 kg
Finished compound 13 - 14 l / 25 kg bag
Type powder
Colour grey
Maximum grain size

0.6 mm

Package size 25 kg

in a dry location approx. 1 year

Lowest usage temperature

- 10°C

Workability time approx. 1 h
Fire class A2

The information is based on tests and practical experience. We cannot affect conditions at the work site so we cannot assume responsibility for the end result affected by local conditions.


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