ARDEX K 11 Levelling and Smoothing Compound

ARDEX K 11 is a rapid hardening, levelling and smoothing compound designed for new, clean, prepared and primed sub-floors such as cement screeds, gypsum screeds and concrete.


  • Receives floorcoverings the next day.
  • Rapid hardening - walkable in 2 1/2 hours.
  • Free flowing mortar 1.5 – 10 mm.
  • Suitable for use over traces of adhesive residues.
  • Can be applied by trowel or pump.
  • Suitable for floors with underfloor heating.
  • Ideal for use with all flooring adhesives.
  • Low odour and high yield.


The mixed mortar can be applied up to a maximum thickness of 10 mm in one application but will still retain its free-flowing properties at a thickness of only 2 mm to provide excellent coverage and material economy.

  • Limitations: ARDEX K11 is limited to 10 mm. This is reduced to 6 mm on ARDEX P 4 or ARDEX P 82 primers when applied to ARDEX DPM/ ARDEX DPM 1C/ ARDEX DPM 1CR.

General information


Receives floorcoverings the next day

Rapid hardening - walkable in 2 1/2 hours

Free flowing mortar 1.5 – 10 mm

Suitable for use over traces of adhesive residues

Can be applied by trowel or pump

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Uniclass 2015

Pr_35_31_06_80 Smoothing and levelling underlay compoundsPrimary


M10/160 Proprietary self smoothing levelling screeds

M40/460 Smoothing underlayment

M50/460 Smoothing/ levelling underlayment compound

M50/65 Laying coverings

Specification data - Smoothing and levelling underlay compounds

Product Reference

ARDEX K 11 Rapid Hardening Levelling and Smoothing Compound


P51 primer

P82 primer

P4 primer

Product Options


All sub-floor surfaces must be primed.

– ARDEX P51:

  • Aqueous synthetic based dispersion primer and bonding agent used to prepare internal surfaces to receive cement-based levelling compounds, adhesives or screeds. Use ARDEX P51 on porous or rough absorbent surfaces, e.g. cement:sand screeds, scabbled concrete, etc.

– ARDEX P82:

  • Two-part water based synthetic dispersion primer and bonding agent used to form a priming/ bonding layer on most substrates, particularly smooth or dense surfaces, e.g. smooth power floated concrete including ARDEX DPM/ARDEX DPM 1C/ARDEX DPM 1CR.

– ARDEX P 4:

  • Solvent free rapid drying primer, applied to concrete, screeds, terrazzo and ceramic tiles and can be used externally.

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