

Remmers MB 2K (formerly Multi-Tight 2K) is a flexible, polymer thick coating which combines the properties of flexible and crack-bridging mineral waterproofing grouts (MWG) and bitumen-thick coatings (PMBC).
Remmers MB 2K (formerly Multi-Tight 2K) is a flexible, polymer thick coating which combines the properties of flexible and crack-bridging mineral waterproofing grouts (MWG) and bitumen-thick coatings (PMBC).
Safety
Versatility
Grout, Filling and Spraying
Remmers MB 2K is a multi-functional wonder when it comes to processing too.
When applying by hand, the user can opt to work with the material as a grout, or apply it using a trowel or even a roller.
On transition areas that are difficult to reach and on small surface areas, such as wall positioning areas and plinths, applying as a slurry has proven effective.
On larger surfaces, Remmers recommend applying with a trowel. Low wastage and high stability of the material ensure high surface coverage.
It is especially effective to apply Remmers MB 2K by spraying. When using machine technology suitable for the construction site, spray application is an efficient alternative to manual methods for surfaces starting from just 40 to 50m².
Thanks to the new 1 : 1 pre-packaging of Remmers MB 2K, significant amounts of time can be saved on site – which means major efficiency gains too.
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.
Data | |
---|---|
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 |
Cross-slit pressure tests | passed, even without a layer of reinforcement |
Water impermeability | tested up to an 8 m water column |
Base | polymer binder, cement, additives, special fillers |
Water vapour diffusion resistance | µ = 1755 |
Reaction to fire | Class E (DIN EN 13501-1) |
Drying time | approx. 18 hours for a 2 mm layer (5 °C, 90% RH) |
approx. 9 hours for a 2 mm layer (23 °C, 50% RH) | |
Bulk density of fresh mortar | approx. 1.0 kg/dm³ |
Consistency | paste-like |
The values stated represent typical characteristic data of the product and are not to be understood as binding product specifications.
Contact our technical team for more information on 0113 2455450 (option 2) or send a message to [email protected].
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.
Substrate preparation
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 mineral substrates with Kiesol MB. Kiesol MB ist not suitable for non-absorbent substrates (e.g. watertight concrete).
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.
Combi-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.
Conditions for use
Temperature of the material, air and substrate: from min. +5 °C to max. +30 °C.
Low temperatures increase, while high temperatures decrease the working and setting time.
Working time (+20 °C)
30-60 minutes
Vertical surface waterproofing
Apply the material in two layers on the previously prepared substrate.
Horizontal surface waterproofing
Apply the material in two layers on the previously prepared substrate.
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 material in two layers on the previously prepared substrate.
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 covers
After 4 hours, work can be continued with adhesive mortar, filling mortar or reinforcement mortar.
Coating
Direct coating with binder-rich dispersion coats.
Always set up a trial area/trial areas first.
Do not use under direct sunlight.
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.
Unless a further load-distributing layer is added, the product is not suitable for waterproofing under raised floor supports.
Ensure sufficient ventilation when applying the product in closed areas (wear respiratory protection if necessary).
Please contact us before applying with machine processing.
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 | ≥ 2.0 | 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 | ≥ 3.0 | 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 | ≥ 3.0 | approx. 3.3 | approx. 3.3 | approx. 7.5 |
W2.2-E*** high exposure to pressing water (anchoring depth >3 m) | --- | ≥ 4.0 | 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 | ≥ 3.0 | 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 | ≥ 2.0 | 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 | ≥ 2.0 | approx. 2.2 | approx. 2.2 | approx. 11.3 |
--- | Water containers with a water depth of up to 8 metres | ≥ 3.0 | approx. 3.3 | approx. 3.3 | approx. 7.5 |
⁽¹⁾ Up to and including batch number 31108815 - application rate: at least 1.2 kg/m²/mm of dry coat thickness.
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 Grouts”, 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.
Always set up a trial area/trial areas first.
Customer agrees that before placing an Order, Customer has read and understood the most up to date Product Data Sheet for the Product. Where we have access to the Product Data Sheet from the manufacturer, we will either provide a copy on request, or include a link to the Product Data Sheet available on the manufacturer’s website. Customer further agrees that we have no liability for any errors or omissions contained within the Product Data Sheets. For more information, please see our Terms & Conditions of Sale.
![]() | Question:
Looking to use internally on damp cellar wall which has previously had Vandex waterproofing render and Limelite finish applied. It was patch repaired in 2021 where the original waterproofing was hacked off, Multi-tight applied and plaster reinstated, but is now failing at the edges of that repair. Suggestion has been that instead of hacking all off the render/plaster can remain and the Multi-tight applied over the top of everything, assuming all friable material removed. Does this seem ok, and how do i treat any areas of mould that might be present? |
Answer from Rawlins’ Technical Team:
Please can you provide more information and pictures of the areas in question to [email protected] so we can assist. | |
Remmers MB 2K (Multi Tight 2K) is only available with the shipping and delivery timescales listed below - please do not contact our Customer Support Team with enquiries about alternative or earlier shipping and delivery times.
Saturdays and Sundays, as well as Bank Holidays, are not classed as working days.
Orders placed after the cut-off for this product will not be processed for earliest dispatch until 9am the next working day.
All delivery costs below are excluding VAT