RMX Longfloor

Self Levelling Floor Screed

Our new screed is a self levelling, cementitious screed which is ideal for all types of flooring, particularly where underfloor heating is to be installed.

This product contains sand and cement with the inclusion of a special binding additive from industry specialist Longfloor.  Because there is no coarse aggregate within it, a great finished floor can be laid much thinner; ten times quicker than traditional screeds and with less labour, saving both time and money.


This product is suitable for:


Installation should be made through a screed pump by approved installers.


  • Self levelling
  • Quick drying
  • Made with cementitious materials as opposed to anhydrite chemicals and can be laid with a depth starting from 35mm
  • Appearance / colour is grey fluid screed mix
  • Compatible with all cement based tile adhesives
  • Can walk on it after 24 hours
  • Thermal conductivity (up to 1.7W/mK)
  • Can be used both for electric and water heating pipes
  • Coverings above pipe are thinner than traditional screeds
  • Product fully encapsulates the pipes
  • No joint requirement up to 100 – 150m2
  • Underfloor heating systems can be turned on after 10 days and the system gradually brought up to operating temperature


  • Great finish and limits damage to underfloor pipes
  • Risk of crazing, cracking and curling severely reduced
  • Minimal wastage
  • No site revisits to sand floor (laitance free)
  • Ten times quicker to lay than other screeds and less labour required, saving time and money

Reinforcement Options

For increased strength and improved crack resistance we can offer Reinforced Concrete.  Refer to the technical download sheet or contact our team for more information.

Product Video

Product Video

Environmental Solution

The concrete can incorporate a proportion of GGBS, a cement replacement material that generates a much lower level of embodied CO2 emissions than ordinary cement, minimising environmental impact.