Ronjon Damp Proof Membrane



Ronjon Damp Proof Membrane and Damp Surface Primer are solvent free two pack epoxy coatings which will cure on wet or damp surfaces. If used alone they can provide a dustproof easily cleaned surface with good resistance to chemical spillage. If used as primers they should be overcoated while they are still tacky to provide maximum adhesion. Damp Proof Membrane is a more highly formulated product designed to provide a pinhole-free moisture barrier and is normally applied as a 200 micron coating.

Both Membrane and Primer are eminently suitable for application to recently laid or refurbished concrete floors allowing them to be quickly brought into use or to be immediately overlaid by a final floor finish. They are also suitable for use under cement based self-leveling finishes which are often affected by moisture ingress.

Finish  Gloss or MattDepending on wetness of substrate.


Cure Times at 200C:
Appearance: Clear 8 – 9 hours24 hours  Touch Dry.Full Cure.


Minimum ApplicationTemperature: 50 C Coverage Rate.Per 200 micron Coat. 4 m2 per kg

Coverage rate depends

upon the substrate

condition and profile.

An allowance should

be made for surface

porosity and texture.

Components: 2 Shelf Life: All components12 months

When stored in unopened

Application Method: Brush or Roller  
Substrate: Clean sound wet, dry orDamp surfaces Pack Sizes:
  Ronjon DP Membrane 5 kg & 10 kg Units
Curing Mechanism: Chemical Reaction Ronjon DSPrimer: 5 kg & 10 kg Units
Pot Life at 20 °C: 1 hr 20 mins  
Cleaner: Ronjon cleaning solvent.

Application Instructions

As with all systems the degree of preparation will determine the effectiveness of the product. Surfaces to be treated can be wet, damp or dry but must be free from laitance, loose dust, dirt, debris or contamination. New concrete should be cured but these products can be used on damp or wet surfaces. Pools of water should be removed if possible.


Add the full contents of Base and Hardener containers together and mix thoroughly with a slow speed drill and suitable paddle. Once mixed the coating will remain workable for 1hr 20 mins.


Apply Ronjon Damp Surface Primer by brush or roller working in to emulsify any surface water if necessary. Application temperature  should be above 5 0C

Application of the Ronjon Damp Proof Membrane is similar but a thickness of at least 200 microns should be applied to floors or walls. Equipment should be cleaned immediately after use with Ronjon Cleaning Solvent.

Health and Safety

Refer to the Ronjon Damp Surface Primer or Damp Proof Membrane Health and Safety Data Sheet before using the product. It is advisable to wear impervious gloves when handling or applying these products.

Any splashes on the skin must be immediately removed by washing with soap and warm water. Do not use solvents for this purpose.  Ensure adequate ventilation is available at all times and avoid breathing vapour.

It is the purchasers responsibility to ensure that the materials are stored and handled within the meaning of the Health and Safety at Work Act 1974.

Conditions of Sale

All RJR  products are manufactured to high quality standards and sold subject to the company’s standard conditions of sale.  A copy is available upon request.


Ronjon DP Membrane Ronjon DS PrimerData