FM 388 light Light plastering mortar

codex FM 388 light is an extremely light and stable filling mortar for layer thicknesses from 5 mm to 20 cm. Optimal for filling larger cavities and wall grooves.


  • For filling wall grooves, installation shafts and cable shafts
  • As filling mortar for radiator niches and masonry openings
  • For plastering installation pipes and WC cisterns
  • For producing slopes in areas of drains and gutters
  • In damp and wet areas
  • Under ceramic tiles and natural stone floor coverings
  • For floor and wall surfaces
  • On concrete and mineral substrates
  • On masonry, cement and lime cement plaster
  • For domestic, industrial and commercial areas


  • From 0.5 to 20 cm layer thickness
  • High coverage
  • Easy processing
  • Quick-setting
  • Low-tension
  • Superb low-slump properties
  • Good filling properties
  • Light material to transport
  • Installation by machine, e.g. PFT G4
  • Sound- and heat-insulating
  • Low chromate content acc. Regulation (EC) No. 1907/2006 (REACH)
  • Highest quality level 4 according to DGNB criterion ENV 1.2 Risks for the local environment
  • EMICODE EC1 PLUS/very low-emission
  • Healthy construction

The low-slump codex FM 388 filler mortar light is perfect for levelling out irregularities and openings with larger layer thicknesses.

Technical data

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

paper bag

Pack size

15 kg

Shelf life

6 months



Minimum working temperature

+ 5 °C to + 25 °C

Ideal working temperatures

+ 10 °C to + 25 °C

Water quantity required

approx. 9.5 l/ 15 kg

Working Time/ Pot Life

approx. 10 min.

Set to foot traffic

approx. 12 hours

Ready to be worked on

after approx. 12 hours

Burning behaviour

A2-s1, d0

Coefficient of improvement of sound absorption

approx. 15 dB with tiling, according to EN ISO 16251-1


approx. 3 kg/ 1 cm layer thickness

Ordering information

Article Packsize Shipping unit
codex FM 388 light / 15kg 168807 15 kg (50 litres)
Pallet :
18 bags

Quality seals and badges


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