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Technical support


Codex near you

Fine levelling compound

FM 20

The self-levelling fine levelling compound codex FM 20 is a fast-setting cement floor levelling compound for layer thicknesses from 0-20 mm in interior areas.

Data sheet

Consumption calculator


  • for the production of even, firm laying surfaces
  • under ceramic tile and natural stone coverings
  • for an even surface where are increased demands on the laying substrate, e.g. for laying large format tiles.
  • for floor areas
  • for heated floor areas
  • for indoor use
  • on calcium sulphate and cement screeds, concrete
  • on mastic asphalt screeds (max. 5 mm)
  • on old substrates with firmly attached, waterproof adhesive remains
  • on old surfaces such as tiles, slabs and terrazzo coverings
  • on dry screed elements
  • in residential, industrial and commercial areas


  • thickness range 0 - 20 mm
  • very good flow
  • extendable by 0 mm
  • quick-setting
  • high productivity, therefore cost-effective
  • low-tension
  • ready for work early - thus saving time
  • universal use
  • best processing properties
  • excellent flow and pumping properties
  • meets requirements C30 F6 according to EN 13813
  • fire behaviour A1-fl
  • low chromate according to EU-VO 1907/2006 (REACH)
  • highest quality level 4 according to DGNB criterion ENV 1.2 Risks to the local environment
  • EMICODE EC1 PLUS / very low emission
  • for healthy construction

The rapid setting levelling compound codex FM 20 is self-levelling and is suitable for levelling out unevenness up to 20 mm to produce level and firm laying substrates.

Pack type

paper bag

Pack size

25 kg

Shelf life

9 months



Minimum working temperature

min. 10 °C at floor level

Ideal working temperatures

°C at floor level

Water quantity required

0.24 - 0.26 litres/ 1 kg
6 - 6.5 litres/ 25 kg

Working Time/ Pot Life

20 - 30 minutes*

Set to foot traffic

approx. 2 hours*

Ready for covering

from approx. 12 hours*

Burning behaviour

A1 fl

Bending tensile strength



1.5 kg/m²/mm thickness


*At 23 °C and 50% relative humidity.

Article Item no. Packsize Shipping unit
codex FM 20 / 25 kg 77146 25 kg
42 bags

Products and accessories

Basket stirrer

The basket stirrer is a special stirring attachment for fast and homogeneous mixing of fillers.

Mixing bucket

The codex mixing bucket is a very sturdy plastic bucket with handles for mixing all codex powder and epoxy products.

Power X 1000

The Power X 1000 mixer is a powerful 1010 Watt mixer for mixing adhesive mortar and levelling compounds. The Wolff Power X 1000 includes a type KR 120 stirrer.

RD 50

The codex RD 50 expansion strip is a self-adhesive PE expansion strip with base, 5 mm thick and 50 mm high. With codex RD 50, the required sound insulation between wall and floor surfaces is achieved.

Water bucket

The codex water bucket is a transparent plastic bucket with an imprinted litre scale for measuring the correct amount of water for codex powder products.