UX 250 Reinforcement and stress-relieving fleece

The codex UX 250 reinforcing and stress-relieving fleece is an alkali-resistant fleece underlay for reducing shear and tensile movements between the substrate and the surface covering. The reinforcing and stress-relieving fleece is flexible and breathable.


The codex UX 250 reliably reduces shear and tensile movements between the substrate and the surface covering and provide for reliable installation.

  • For restoration/renovation and new buildings
  • On all load-bearing substrates
  • On old tile and natural stone flooring
  • On cementitious screeds, calcium sulphate screeds or concrete
  • On mastic asphalt screeds and precast screeds
  • On old substrates with strongly bonded compound and adhesive layers
  • On firmly screw-fixed P4 - P7 chipboard or OSB/2–OSB/4 panels
  • On substrates with mixed patches
  • On heated structures
  • For interior applications


  • Provides stress relief
  • Covers cracks
  • Alkaline-resistant
  • Stress-relieving
  • High tensile strength and slip-resistant
  • Breathable
  • Easy to cut

Technical data

Pack type


Pack size

50 m²

Shelf life

36 months




approx. 1.1 mm

Burning behaviour

Bfl s1

Area weight

approx. 250 g/m²

Ordering information

Article Packsize Shipping unit
codex UX 250 / 50 m² 12298 50 m²
Pallet :
12 rolls

Quality seals and badges


Installation systems for screeds, floors and wood flooring

Machinery and special tools for substrate preparation and installation of floor coverings

Complete product range for installation, renovation and maintenance of wood flooring

Resin and cementitious floor finishes combining performance and design

Installation systems for tiling and natural stone

High quality painting, plastering and drywalling tools