MB PUReactive

The substrate must be level, stable, dry, clean, and free of dust, oil, grease and separating agents, see also the primer recommendation.

Absorbent mineral substrates may be slightly damp.

If necessary, MB PUReactive is applied to absorbent substrates as a contact layer at an application rate of approx. 500 g/m².

Fill depressions > 3 mm using a suitable filler or MB PUReactive blended with Selectmix 0/10.

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 approx. 2 minutes.

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

Processing time (+20 °C/50% RH):
90 minutes

Follow-up work and coverings

Surface waterproofing + Detail waterproofing

Apply MB PUReactive to the prepared substrate using a suitable tool.
Embed MB PUReactive F-series fabric, taking care not to trap any air, and fully cover with the product (total application rate min. 3.0 kg/m²).

Embed MB PUReactive F-series fleece overlapping at least 5 cm.

Recommendation: apply the product in the area of the overlaps between the layers.

The adhesion to the substrate must be tested on a case-by-case basis.

Always set up a trial area/trial areas first.

Direct sunlight and/or wind can cause accelerated skin formation on liquid-applied waterproofing materials.

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

The contact layer (scratch coat) is not deemed to be a waterproofing layer.

The maximum total wet layer thickness must not exceed 4 mm.

The minimum dry layer thickness is 2.1 mm.

The dry layer thickness of the waterproofing layer must not fall below the minimum value at any point. To ensure that the minimum dry layer thickness is achieved, the product must be applied in a quantity that takes into account the layer thickness allowances (DIN 18531) so that processing tolerances, unevenness and roughness of the substrate are evened out. The quantity applied per square metre must be documented.

Protect fresh waterproofing from rain, frost and condensation.

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

Mixing tool, flat brush, roller, smoothing trowel

Clean tools with water while the material is still fresh.

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

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.

Min. 1.5 kg/m²/mm dry layer thickness
Total application rate min. 3 kg/m²

Determine the exact requirement, taking into account roughness depth and application-specific allowances, on a sufficiently large test area.

Dry layer thickness: min. 2.1 mm
Wet layer thickness: min. 2.3 mm

Note the layer thickness allowance in accordance with DIN 18531-3:
DIN 18531 Part 3 stipulates a layer thickness allowance d_z to ensure the minimum dry layer thickness d_min.
This takes into account both processing-related fluctuations d_v and the additional amount needed for levelling the substrate d_u. If the substrate is levelled separately (e.g. by means of a scratch coat), d_u is not included in the calculation.

d_u = scratch coat or levelling allowance approx. 0.5 kg/m² (depending on the substrate)
d_v = allowance for processing-related fluctuations approx. 0.4 kg/m²

Seams, joints, connections and terminations as well as penetrations of existing waterproofing membranes must be designed to be resistant to backflow and sufficiently diffusion-tight. If required, a structural functional layer (vapour barrier) must be planned and implemented.

In the case of damp roof constructions, drying measures must be taken into account before applying the waterproofing and any existing structural defects must be inspected and rectified.

When waterproofing an inverted roof that is not ventilated from behind or a warm roof, water vapour diffusion on the inside must be prevented by means of a vapour barrier.

For the waterproofing of inverted and green roofs, please consult RTS Professional Planning (phone 05432 83434 + RTS-Fachplanung@remmers.de).

Current regulations and legal requirements must be taken into account and deviations from these must be agreed separately.

Certificates of suitability (EAD) must be observed during planning and execution.

Special agreements and certificates of suitability can be downloaded online at www.remmers.com.

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.

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.