FM 20 Levelling compound

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.


  • 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 content acc. Regulation (EC) No. 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.

Technical data

*At 23 °C and 50% rel. humidity.
Pack type

paper bag

Pack size

25 kg

Shelf life

9 months



Minimum working temperature

on the ground at least 10 °C

Ideal working temperatures

+ 15 to + 25 °C

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

Compressive strength

C 30

Bending tensile strength



1.5 kg/m²/mm layer thickness

Ordering information

Article Article number Packsize Shipping unit
codex FM 20 / 25 kg 77146 25 kg
Pallet :
42 bags

Quality seals and badges


Products and accessories

Basket stirrer

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

Mixing bucket 30 l

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 Self-adhesive PE expansion strips

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 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.

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Installation systems for tiling and natural stone

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