• Betofix R4 EM [basic]

    Article No. 108625

    Betofix R4 EM [basic]

    High-strength PCC screed mortar

    Colour: grey | 1086
    Packaging unit

    Product specifications

    On delivery

    Resistance to ground 7 × 106 Ω
    Flexural tensile strength (28 days) ≥ 8.0 N/mm² (EN 13892)
    Reaction to fire Class A1fl
    Compressive strength 1 day: ≥ 15 N/mm²
    7 days: ≥ 35 N/mm²
    28 days: ≥ 50 N/mm² (EN 13892)
    Maximum grain size 5 mm
    Water requirement Approx. 7.5% corresponds 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 screeds
    • Floating screeds
    • Screeds on separation layers
    • Heated screeds
    • Industrial screeds
    • Load-bearing layer underneath reactive resin coatings


    • High mechanical resistance
    • Low shrinkage
    • Low-stress and crack-free setting
    • Machine workable
    • Reaction to fire: Class A1fl
    • Compressive strength after 28 days: ≥ 50 N/mm²
    • Preparation
      • Substrate requirements

        Clean, dust-free and capable of supporting a load.

      • Preparations

        Pre-wet the substrate so that it is slightly moist.

        Expose the grains close to the surface.

        The substrate must have an average pull-off strength of at least 1.5 N/mm²

    • Application
      • Smoothing trowel
      • Application temperature: min. 5 °C max. 30 °C
      • Application requirements

        Temperature of the material, air and substrate: min. +5 °C to max. +30 °C

      • 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.

        Compact and smooth after pouring.

    • Application instructions
      • Once it has hardened, mortar must not be made workable again by adding either water or more wet mortar.

        Use screed rails to ensure that the product is poured to the correct height.

        Protect wet mortar surfaces against frost, rain and drying out too quickly for at least 4 days.

        Ready for covering after approx. 7 days

        Hairline/shrinkage cracks are safe and are not cause for complaint as they do not impair the properties of the mortar.

    • Working tools / cleaning
      • Smoothing trowel
      • Mixer, trowel, aluminium rule, finishing trowel, power trowel Suitable machine technology

      • Clean tools with water while the material is still fresh.

    • Storage / shelf life
      • Protect form moisture
      • Shelf-life 9 months
      • If stored dry in closed containers, the product will keep for approximately 9 months.

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

    • General information
      • The mixing water must be of drinking water quality.

        May contain traces of pyrite (iron sulphide).

        Low chromate content in accordance with Directive 2003/53/EC.

        The characteristic data of the product were calculated under laboratory conditions at 20°C and 65% relative humidity.

    • 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.