Kiilto Tasoflex
Self-levelling foor levelling compound

A self-levelling universal floor levelling compound. Suitable also for levelling floors that will be be painted. Low alkali.

Special features

  •  self-levelling
  • general levellings 
  • coverage 1.6 kg/m²/mm
  • walkable: 5 h
  •  coatable: 10 mm/1 d, 20 mm/3 d
  •  interior areas





Suitable for levelling floor surfaces at thicknesses of between 3–20 mm before laying the floor covering.

The substrate must be clean, solid and firm. Remove cement laitance and paint splashes, and vacuum the floor thoroughly.

Concrete subfloors are pre-treated with 1:4 diluted Kiilto Start Primer or Primer One (20% Kiilto Primer/80 % water) prior to application of the floor screed. Surfaces under reconstruction as well as board surfaces must be primed with undiluted Kiilto Start Primer or Kiilto PrimerOne before levelling. Non-absorbent substrates, such as ceramic tiles or painted surfaces, can be treated also with Kiilto Fix Primer.

A low alkaline screed layer protects the adhesive and vinyl coating from the damage caused by alkaline moisture in the concrete. The studies have shown that a 5 mm thick screed layer provides the protective effect.

The concrete subfloor must comply with national standards.

Package Size EAN Code
20 kg 6411512017204
Application temperature

Optimal +18–23 °C, minimum +10 °C

Bond strength

(> 1 MPa), EN 13813

Classifications and certificates

CT-C20-F6 (EN13813), M1


1 d / 10 mm
3 d / 20 mm
( 23 ºC, 50 % RH )

Compression strength

C20 (> 20 MPa), EN 13813


1,6 kg/m² (a layer of 1 mm)
(approx. 12 litres of screed/bag)

Fire class


Flexural strength

F6 (> 6 MPa), EN 13813

Layer thickness

3–20 mm

Max. grain size

Approx. 0.5 mm

Mixing ratio

Approx. 4.5 l water / 20 kg bag

Package sizes

20 kg bag


< 0,4 ‰ (23 ºC, 50 % RH )


Unopened package in a dry place 1 year.

Substrate humidity

Concrete < 90 % RH


synthetic resin-special cement-quartz-based powder


Flow rate 145–155 mm, EN 12706


approx. 5 hours ( 23 ºC, 50 % RH )

Working time

Approx. 30 min. ( 23 ºC, 50 % RH )


< 11 (low alkali)

Instructions for use

Fill the mixing container with the required amount of clean, cool water (+10-25ºC). Strew powder slowly while stirring until a smooth, flexible mass is formed. Let the mix mature for approx. 2 min. and then remix vigorously once before use.

Apply screed evenly by using a steel or notched trowel. Screed can also be applied by using an appropriate floor screed pump.

The drying of the screed must not be accelerated by heat or ventilation, since too quick a drying may cause hair cracks. If the temperature in the levelled room is higher than normal, the relative humidity very low, or if the levelled floor surface is exposed to direct sunlight, we recommend covering the floor with a tarpaulin as soon as it is dry enough to allow walking. The floor should be covered with a flooring relatively soon after it has hardened and dried. This will prevent the surface from over drying, cracking and becoming loose.

Suitable also for floors that are going to be painted in secondary rooms with light traffic, but not, for example, in garages or for bathroom floors, etc.

In areas where waterproofing is used, e.g., bathroom floors, floor levelling should be applied under the waterproofing membrane.

Not suitable for areas permanently under water (e.g., swimming pools).

Note! Avoid excessive use of water, since it will weaken the surface strength and may cause separation or cracking.

Additional information

The information given in this product data sheet is based on our tests and our practical knowledge. The technical data is defined in standard conditions. Variations in local working conditions and methods will affect the product performance and result. We guarantee the high quality of our products according to our Quality Management System. No liability can be accepted from incorrect use of the product or prevailing conditions, over which we have no control. Thus, we cannot be held responsible for the final result. The correct use of the product presupposes that the user has made him/herself aware of the contents of the working instructions and procedure guide, if provided.

Environment and safety

Avoid unnecessary skin contact and exposure with the fresh product, use safety gloves. Refer to material safety data sheet. For information on product and package disposal, go to