Ronacrete RonaStop Monoprufe DPM

Ronacrete Monoprufe DPM is a liquid applied surface damp proof membrane designed to reduce the passage of water vapour and allow the adhesion of thin bonded and fast drying screeds to concrete which is either not fully dry or does not have a functioning DPM.

Best Uses

Ronacrete Monoprufe Damp Proof Membrane is a liquid applied surface damp proof membrane designed to reduce the passage of water vapour and allow the adhesion of thin bonded and fast drying screeds to concrete which is either not fully dry or does not have a functioning DPM.

Ronacrete Monoprufe DPM is also suitable for use prior to the application of tiles, soft flooring or wood flooring to screeds which are not fully dry.

• Water based membrane system
• Reduces water and water vapour permeability
• Designed to accept thin bonded screeds
• Compatible with most Ronacrete screed and topping systems
• Easy to mix and apply
• Quick drying two or three coat application
• Non-hazardous, solvent free, low odour
• Suitable for use prior to the application of tiles, soft flooring or wood flooring to screeds which are not fully dry

Supplied as a liquid and a powder Monoprufe DPM is applied as a two or three coat membrane

Application

Preparation
In all cases the substrate must be sound and have sufficient tensile strength to sustain an adequate bond with the Monoprufe DPM, to prevent debonding caused by vapour pressure and in the case of overlaying with high strength screeds, topping or finishes, to prevent disruption of the substrate during curing or subsequent trafficking.

When mechanically abrading surfaces, vacuum blasting is preferable. A heavy surface profile should be avoided in order to minimise the risk of the Monoprufe DPM ponding or not covering high points. When overlaying with an unbonded screed, surface preparation requires the substrate to be clean, sound and free of contamination including oil and dirt.

If an unbonded screed is being laid on top of Monoprufe DPM, install a separating layer between the Monoprufe DPM and screed to prevent partial adhesion.

Damping
Following surface preparation and before applying Monoprufe DPM the surface must be damped with clean water, allowing water to soak in to the surface and reduce porosity. Excess standing and ponding water must be removed, and the surface left damp.

Application
Ensure the Monoprufe DPM is properly mixed and the powder evenly dispersed. Apply by brush or roller on to the damp surface at a minimum coverage rate of 0.7kg per m2 per coat, this coverage rate takes no account of substrate texture or profile, usage will be greater on textured or uneven substrates. It is essential to ensure even coverage and to achieve a continuous pinhole free film. Do not overspread the material.

Apply the second (and third coats) as above. Allow the previous coat to dry for not less than 1 hour and not more than 24 hours before applying the second coat. The second coat is applied at 90° to the first. Do not damp between coats. If covering with a bonded screed, or if other finishes are to be applied more than 24 hours after application of the second coat, a third coat must be applied within 24 hours of the application of the second coat. Blind the third coat with kiln dried
sand to provide a key. The membrane must be protected at all times against site traffic until it is covered.

Applying Ronacrete bonded screed
Note that when applying a thin bonded screed (eg. Ronafix or RonaScreed) a primer coat of Ronafix & cement or other Ronacrete primer compatible with the screed or topping, must be applied directly on to the dry Monoprufe DPM, before the screed or topping is laid.