• Betofix R4 SR

    Article No. 108425

    Betofix R4 SR

    Fibre-reinforced PCC/SPCC (RM/SRM) for the static repair of concrete structures / coating mortar as per DIN 19573

    Colour: Betofix R4 SR | 1084
    Size / Quantity

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    Product specifications

    On delivery

    Flexural tensile strength (28 days) ≥ 8.0 N/mm²
    Reaction to fire Class A1
    Compressive strength 1 d = ≥ 15 N/mm²
    7 d = ≥ 40 N/mm²
    28 d = ≥ 50 N/mm²
    Moisture class assignment WO, WF, WA, WS
    External surveillance QDB
    Maximum grain size 2 mm
    Adhesion capacity (DIN EN 1542) (28 days) ≥ 2.0 N/mm²
    Capillary water uptake ≤ 0.5 kg/(m²h0.5)
    Layer thickness Single layer 5 - 25 mm, in broken-out areas < 80 mm
    Two layers < 50 mm, apply wet-on-wet
    Machine application: multiple layers, wet-on-wet < 50 mm
    Water requirement Approx. 10.7%, equivalent to 2.7 l/25 kg
    Shrinkage (28 days) ≤ 0.55 mm/m
    Exposure class assignment Carbonation XC1 XC2 XC3 XC4 Chlorides without sea water XD1 XD2 XD3 Chlorides from sea water XS1 XS2 XS3 Frost attack with/without de-icing agent XF1 XF2 XF3 XF4 Chemical attack XA1 XA2 XA3 Wear load XM1 XM2 Wastewater XWW1 - XWW3

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

    Field of application

    • For use on floors/walls/ceilings indoors and outdoors
    • Concrete structures in areas under high chemical loads (up to and including exposure class XA 3)
    • Repair and coating mortar for wastewater facilities
    • Repairing concrete structures with rough surfaces in areas subjected to static and dynamic loads
    • In sewage systems exposed to high level of chemical attack, such as settling tanks, sludge thickeners and intakes
    • In drinking water systems, meets the requirements in accordance with the work sheets W 270, W 300 and W 347 of the German Technical and Scientific Association for Gas and Water (DVGW)
    • Supporting walls, facades, slabs and balconies
    • Underneath carriageway surfacing on bridges and multi-storey car parks
    • Inside and outside old and new buildings and in the wet areas of these buildings
    • Repairing concrete structures with rough surfaces in areas subjected to static and dynamic loads


    • M3 mortar according to SIB Guideline and Class R4 according to DIN EN 1504-3 and B2 according to DIN 19573 (WW coating mortar)
    • Exposure classes XWW1 - XWW3 according to DIN 19573
    • Can be applied manually, sprayed or shot
    • High sulphate resistance and low active alkali content (SR/NA)
    • Single-layered application thickness in cracks up to 80 mm
    • Freeze/thaw-resistant
    • High resistance to chloride penetration
    • Combines corrosion protection, a bonding layer and coarse and fine mortar
    • Can be used without a bonding layer if applied by spraying
    • Preparation
      • Substrate requirements

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

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

      • Preparations

        Use a suitable method to remove loose parts and substances that could inhibit adhesion, such as cement slurry and impurities, until a load-bearing skeleton is obtained.

        Expose steel parts, remove rust to purity level SA 2.

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

    • Application
      • Mortar pump/ Trowel / Filling knife / Smoothing trowel / Mortar pump
      • Application temperature: min. 5 °C max. 30 °C
      • Application requirements

        Temperature of the material, air and substrate: from min. 5 °C to max. 30 °C. Low temperatures will extend the working and hardening times and high temperatures shorten them.

      • Manual working

        Use the product to apply a scratch coat.

        Dilute the product slightly before applying the product to hard-to-reach places in the form of contact sludge.

        Layer thickness, single-layered 5–25 mm

        Layer thickness, double-layered < 50 mm, with the second layer applied while the first is still wet

        Layer thickness, single-layered in cracks < 80 mm


        Machine working

        Layer thickness, multi-layered, with the next layer applied while the previous one is still wet < 50 mm


    • Application instructions
      • The pre-wet substrate must still be slightly absorbent.

        If the concrete cover measures less than 10 mm after completing repair work, protect the concrete reinforcement against corrosion using Betofix KHB.

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

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

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

        Mixing by hand and the mixing of partial quantities are not permitted.

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

    • Working tools / cleaning
      • Mortar pump/ Trowel / Filling knife / Smoothing trowel / Mortar pump
      • Mixer, trowel, smoothing trowel

      • 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

      • Apply to a large enough trial area to determine the precise amount required.

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

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

        May contain traces of pyrite (iron sulphide).

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

        Deviations from applicable regulations must be agreed separately.

        The relevant test certificates must be observed when planning and carrying out work.

    • 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.

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