• MB 2K
  • MB 2K
    • MB 2K
    • MB 2K

    Article No. 301408

    MB 2K

    Multi-functional building waterproofing Combines the properties of flexible and crack-bridging mineral waterproofing grouts (MWG; AbP as per PG-MDS/FPD) and bitumen thick coatings (PMBC; U report according to DIN EN 15814)

    Product specifications

    On delivery

    Base polymer binder, cement, additives, special fillers
    Reaction to fire Class E (DIN EN 13501-1)
    Bulk density of fresh mortar approx. 1.0 kg/dm³
    Consistency paste-like
    Crack-bridging ≥ 3 mm (with a dry layer ≥ 3 mm thick)
    Layer thickness 1.1 mm thick wet layer produces approx. 1 mm thick dry layer ⁽¹⁾
    Cross-slit pressure tests passed, even without a layer of reinforcement
    Water vapour diffusion resistance µ = 1755
    Water impermeability tested up to an 8 m water column

    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 indoors and outdoors
    • Rapid waterproofing
    • Waterproofing in new buildings
    • Horizontal waterproofing in and underneath walls
    • WTA-compliant retroactive waterproofing
    • Can be applied > 3 m below ground
    • Approved for connecting to water impermeable concrete structures
    • Waterproofing of foundations and base points
    • Waterproofing in a bond
    • Bonding layer on old bitumen coatings
    • Repair of flat roof waterproofing on roofs of structures which are not habitations


    • Tested on crack formation of greater than 3 mm (according to DIN EN 14891)
    • Complete drying and cross-linking occur rapidly, after just 18 hours
    • Meets the test requirements for PMBC
    • Radon-tight (verified through testing)
    • Solvent-free
    • Bitumen-free
    • Water pressure tight
    • High tensile adhesion strength
    • Excellent adhesion on non-mineral substrates (e.g. plastics, metals)
    • Highly flexible, elastic and crack-bridging
    • Can be covered after a very short time (≥ 4h)
    • UV-resistant
    • Freeze/thaw-resistant
    • Can be plastered and painted over
    • Can be applied as a grout, with a brush or trowel, or by spraying
    • Preparation
      • Substrate requirements

        The substrate must be clean, dry, flat and capable of bearing a load, and free of dust, oil, grease and release agents.

        Roughen non-mineral substrates.

      • Preparations

        Remove projecting seams and mortar remains.

        Break off or slope corners and edges.

        In coves, embed Tape VF (Art. 5071) into the material and smooth to < 20 mm.

        Alternatively, use a suitable mortar to produce a sealing cove.

        Close indentations > 5 mm with a suitable filler or with MB 2K mixed with Selectmix RMS (MR of between 1:1 and 1:3).

        Roughen the surface of plastic pipes with sandpaper; clean and, if necessary, sand metal pipes.

        If necessary, provide damp proofing.

        Prime absorbent mineral substrates with Kiesol MB.

        Apply a scratch coat (approx. 500 g of MB 2K/m²) with the product itself as a contact layer and in order to prevent blisters.

    • Preparation
      • Mixing time 3 min
      • Combination container

        Stir the liquid component with a suitable mixing tool.

        Loosen the powder component and add it in full to the liquid component.

        Mix for approx. 1 minute before suspending the mixing process to allow the air that has been stirred in to escape.

        Remove the powder adhering to the side.

        Mix again for 2 minutes.

        Keep the mixing tool near the bottom of the bucket while mixing.

    • Application
      • By brush / Mortar cover / Trowel application / Spraying
      • 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.

      • Vertical surface waterproofing

        Apply the product in two layers on the previously prepared substrate in accordance with the applicable regulations.

        Horizontal surface waterproofing

        Apply the product in two layers on the previously prepared substrate in accordance with the applicable regulations.

        After the waterproofing has dried thoroughly, place two layers of PE sheet over the waterproofing before the screed is laid.

        At the edges, the waterproofing layer is applied up to the upper edge of the floor or up to the horizontal barrier.

        Horizontal waterproofing in and underneath walls

        Apply the product in two layers on the previously prepared substrate in accordance with the applicable regulations.

        Connection details/building element joints

        Use the Water Stop VF system to bridge corner and connecting joints, as well as connections to rising components (e.g. full-length windows, doors).

        Apply MB 2K and work in the Tape VF so that it is crease-free.

        Pipes passing through walls

        Seal passing-through pipes by using the product to form a cove around them.

        When an adhesive flange or loose/fixed flange is used for pipes passing through walls, they should be bedded into the waterproofing.

        Use Remmers Pipe Flange in cases where the water load is "pressing water".

        Plinth render

        If render is to be subsequently applied, an additional layer of grout should be spread on to the last layer of waterproofing. SP Prep can then be thrown over the entire surface of the fresh layer of grout.

        Work can be continued with compound mortar and reinforcement mortar after approx. 4 hours without an additional layer of grout/preparatory mortar.

        Follow-up work and coverings

        After 4 hours, work can be continued with adhesive mortar, filling mortar or reinforcement mortar.


        Direct coating with binder-rich dispersion coats.

        Always set up a trial area/trial areas first.


    • Application instructions
      • In the case of liquid-applied waterproofing materials, direct sunlight and/or wind exposure can cause accelerated skin formation and accompanying blistering.

        Do not use in direct sunlight.

        Do not use on untreated aluminium.

        The scratch layer does not as a rule count as a waterproofing layer.

        The maximum total wet coat thickness must not exceed 5 mm.

        Moving the material (e.g. by stirring) in the mixing bucket can prevent premature skin formation.

        Mortar that has already set cannot be made workable again by adding water or fresh mortar.

        Protect the fresh waterproofing layer from rain, direct sunlight, frost and condensation water.

        Once dry, protect from mechanical damage.

        Add a further load-distributing layer if using the product for waterproofing under raised floor supports.

        Ensure sufficient ventilation when applying the product in closed areas (wear respiratory protection if necessary).

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

    • Working tools / cleaning
      • Mortar cover / Filling knife / Trowel application / Application by spraying
      • Mixer, ladle, smoothing trowel, layer thickness trowel, wide brush, surface brush, roller

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

        Any material that has already begun to dry can only be removed mechanically.

    • Storage / shelf life
      • Shelf-life 9 months
      • Store frost-free and cool / protect for moisture / close containers
      • If stored unopened in its original container in a cool, dry place and protected against frost, the product will keep for at least 9 months.

    • Usage
      • 1.1 kg / mm thick layer / m²
      • At least 1.1 kg/m²/mm of dry coat thickness Coat thicknesses and application rate when used as a crack-bridging MWG in interior and exterior areas: see application rate table under application examples.

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

    • Application examples
      • Water exposure classes

        (DIN 18533)

        Dry film thickness (mm)
        Wet film thickness (mm)
        Application quantity (kg/m²)⁽¹⁾
        Yield 25 (kg/m²)
        W1.1-E/W1.2-E* Soil moisture and non-pressing water
        Soil moisture and non-pressing water
        ≥ 2
        approx. 2.2
        approx. 2.2
        approx. 11.3

        W2.1-E** moderate exposure to pressing water (anchoring depth <3 m)

        Standing seepage water and pressing water
        ≥ 3
        approx. 3.3
        approx. 3.3
        approx. 7.5
        W2.1-E** moderate exposure to pressing water (anchoring depth <3 m)
        Waterproofing at transition to water-impermeable concrete building elements
        ≥ 3
        approx. 3.3
        approx. 3.3
        approx. 7.5

        W2.2-E*** high exposure to pressing water (anchoring depth >3 m)

        ≥ 4
        approx. 4.4
        approx. 4.4 
        approx. 5.6

        W3-E** non-pressing water on soil-covered ceiling

        Non-pressing water on soil-covered ceiling
        ≥ 3
        approx. 3.3
        approx. 3.3
        approx. 7.5
        W4-E Splashing water at wall plinth and capillary water in and underneath walls in contact with the ground

        Splashing water/plinth waterproofing

        ≥ 2
        approx. 2.2
        approx. 2.2
        approx. 11.3
        W4-E Splashing water at wall base and capillary water in and underneath walls in contact with the ground
        Waterproofing in and underneath walls≥ 2
        approx. 2.2
        approx. 2.2
        approx. 11.3
        Water containers with a water depth of up to 8 metres
        ≥ 3
        approx. 3.3
        approx. 3.3
        approx. 7.5

        *     On masonry with special agreement
        **   Special agreement required
        *** Special agreement required / Only permitted for use on concrete substrates 
        Film thickness margin according to DIN 18533:
        du = scratch coat, application rate approx. 0.5 kg/m² (depending on substrate)
        dv = not necessary with layer thickness trowel/ without layer thickness trowel: application rate approx. 0.4 kg/m² (dmin = 3 mm)
        ⁽¹⁾ Up to and including batch number 31108815 - application rate: at least 1.2 kg/m²/mm of dry coat thickness.

    • General information
      • 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 guideline “Planning and Execution of Waterproofing Building Elements with Ground Contact using Flexible Waterproofing Slurries”, published by Deutsche Bauchemie, 2nd edition as per 2006, should be observed.

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

        The special agreements as well as test certificates can be downloaded online at www.remmers.com.

        Always set up a trial area/trial areas first.

    • 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.

    MB 2K in der Anwendung: