ARDEX A 38 MIX Pre-Blended Rapid Drying Screed

ARDEX A 38 is a special cement for producing a rapid setting, hardening and drying floor screed for internal or external use, including swimming pools, allowing ceramic tiles or stone to be fixed after only four hours, even on unbonded and floating screeds. ARDEX A 38 can be used to produce a bonded screed, an unbonded floor screed laid onto a membrane, or a floating floor screed laid onto a compressive quilt/ insulating material.


  • Rapid hardening – walkable in three hours.
  • Receives ceramic and natural stone tiles directly after only four hours for bonded, unbonded and floating screeds.
  • Install resilient, wood finishes and vinyl floor coverings after 48 hours.
  • After only one day the compressive and tensile bending strengths of ARDEX A 38 exceeds the acceptable minimum attained by an ordinary cement screed after 28 days.
  • Can be used with underfloor heating systems.
  • Can be pumped for fast application.

General information





Uniclass 2015

Pr_35_31_06_69 Quick-drying levelling screed mixesPrimary


M10/110 Bonded cement:sand levelling screeds

M10/115 Cement:sand levelling screeds

M10/130 Proprietary quick drying levelling screeds

M10/2 Bonded cement:sand levelling screeds

M10/4 Cement:sand levelling screeds

Specification data - Quick-drying levelling screed mixes

Product Reference

ARDEX A 38 Ultra Rapid Drying Cement for Internal & External Screeds

Standard product features

Compressive strength:

  • After 1 day: 25.0 N/mm².
  • After 7 days: 40.0 N/mm².
  • After 28 days: 45.0 N/mm².

Tensile bending strength:

  • After 1 day: 4.0 N/mm².
  • After 7 days: 4.5 N/mm².
  • After 28 days: 5.5 N/mm².

Product Options


ARDEX A 38 should be applied at the following thicknesses for normal cement/ sand screeds:

  • Minimum 15 mm (design thickness up to 40 mm) for bonded screeds.
  • Minimum 50 mm for unbonded screeds.
  • Minimum 75 mm for floating screeds (65 mm in lightly loaded (domestic) locations).

Digital objects
Platform Compatible Version Certified to

Revit 2016




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