Article No. 109425

    Betofix R4 EM rapid

    Fast-acting, high-strength PCC screed mortar

    1094 | grey
    Size / Quantity

    Product specifications

    On delivery

    Flexural tensile strength 28 d: ≥ 6.0 N/mm²
    Reaction to fire Class A1fl
    Compressive strength Room temperature 20 °C:
    6 h: ≥ 15 N/mm²
    24 h: ≥ 35 N/mm²
    28 d: ≥ 40 N/mm²
    Room temperature 5 °C:
    24 h: ≥ 30 N/mm²
    28 d: ≥ 40 N/mm²
    Bulk density of fresh mortar Approx. 2.1 kg/dm³
    Maximum grain size 5 mm
    Water requirement Approx. 8%, equivalent to 2.0 l/25 kg

    The stated values represent typical product characteristics and are not to be construed as binding product specifications.

    Field of application

    • For use on floors indoors and outdoors
    • Repair of concrete construction components with a rough surface that are positioned horizontally or at a gentle slant
    • Bonded screed, floating screed and screed on separating layer
    • Heated screeds
    • Load-bearing layer underneath reactive resin coatings
    • Base layer under Remmers Crete coatings
    • Interior and exterior use


    • High mechanical resistance
    • Fast curing
    • Low shrinkage
    • Low-stress and crack-free setting
    • Can be applied by machine
    • Screed according to DIN EN 13813: CT - C40 - F6 - A7 - B1.5
    • Preparation
      • Substrate requirements

        The substrate must be firm, dimensionally stable, capable of bearing loads and free of loose constituents, dust, oil, grease, rubber marks and other substances that could interfere with adhesion.

        The tensile strength of the surface of the substrate must be at least 1.5 N/mm² on average (smallest individual value of at least 1.0 N/mm²), and the compressive strength must be at least 25 N/mm².

    • Application
      • Application temperature: min. 5 °C max. 25 °C
      • Smoothing trowel
      • Application time::
        (+20 °C): approx. 30 minutes


        Layer thickness

        Single layer thickness < 80 mm

        Layer thickness in breakouts up to max. 100 mm

        In the case of bonded screeds, apply the product while the bonding layer is still wet.


        Subsequent processing

        Protect fresh mortar surfaces from wind, direct sunlight, rain and/or frost for at least 3 days so that they do not dry too quickly.


        Machine working

        Please contact Remmers Technical Service (phone +49 5432 83900) before applying with machine processing.


    • Working tools / cleaning
      • Smoothing trowel
      • Mixing tool, trowel, aluminium rule, smoothing trowel, power trowel

        Clean tools with water while the material is still fresh.

    • Storage / shelf life
      • Protect form moisture
      • Shelf-life 12 months
      • If stored in an unopened container and in a dry place, the product will keep for approx. 12 months.

    • Usage
      • 2.0 kg / mm thick layer / m²
      • Approx. 2.0 kg/m²/mm coating thickness, or approx. 2.0 kg/dm³

    • Disposal instructions
      • Larger quantities of leftover product should be disposed of in the original containers in accordance with the applicable regulations. Completely empty, clean containers should be recycled. Do not dispose of together with household waste. Do not allow to enter the sewage system. Do not empty into drains.

    • Safety / regulations
      • For further information on the safety aspects of transporting, storing and handling the product and on disposal and environmental matters, please see the current Safety Data Sheet.