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Watco Epoxy Damp Proof Membrane

Holds back rising damp on new or old concrete floors

  • Withstands 98% relative humidity
  • New 'easy application' formula
  • Holds back rising damp
  • Can be overcoated with most Watco coatings
Frequently bought together


Epoxy Damp Proof Membrane can be used on new or old concrete and sand and cement floors to hold back damp.

Recommended areas of use

  • Concrete floors subject to rising damp
  • New or old concrete floors where a DPM has failed or was never installed
  • Suitable for heavy wear areas
  • Use on areas of damp concrete which cannot be surface dried prior to painting


  • 100% solids, high build coating
  • Virtually solvent free liquid epoxy resin damp-proofer
  • Withstands 98% RH
  • Holds back rising damp where a damp proof membrane is either missing or defective
  • Can be over painted after 16 hours with most types of floor coatings

If a DPM has failed or perhaps was never installed in the first place, the features of this product will effectively suppress vapour and hold back damp.

Curing Times* 
10°C7-10 hours
15°C4-6 hours
20°C3-4 hours

*Curing times quoted are for touch dry or 'walk on' 

Overcoating Time - Allow 16 hours at 15°C before applying any Watco 100% solids coating such as Epoxicote™ High BuildChemi-Coat®Safety Grip®Bund Sealer, etc. Allow 24-48 hours before applying water based products such as Watco Epoxy Gloss Coat or Safety Coat. If more than 4-5 days have elapsed before overcoating, Epoxy Damp Proof Membrane should be lightly abraded to provide a key. 



Suitable for Concrete
Finish Dark Grey
Interior or Exterior Interior
Primer required No primer required
Composition 2 part, 100% solids epoxy resin
Number of components 1 x curing agent and 1 x resin
Coverage 20-25m per 8kg
Number of coats 1
Recommended number of coats 1
Wet film thickness 250 microns
Dry film thickness 250 microns
Curing time (at 15°C) 16 hours
Minimum application temperature 10°C
Pot life 1 hour at 15°C
Shelf life 6 months in an unopened container
Cleaning tools It is not practical to clean the roller sleeves and they should be discarded after use



Concrete & sand and cement screed – should be sound, clean and free of any contaminants liable to prevent penetration into the substrate or adhesion to the surface. Machine scarifying or shot blasting are ideal ways to clean and prepare large areas of concrete and remove contaminants. Use a vacuum to remove all surface dust. 

Very smooth or power floated concrete – should be shot blasted to provide a good key for the Epoxy Damp Proof Membrane to bond to. Use a vacuum to remove all surface dust.

Underfloor heating systems – should be switched off at least two days prior to the application of Epoxy Damp Proof Membrane and left for a minimum of two days before switching back on. Once switched on, the underfloor heating should gradually be turned up a few degrees at a time.


The product comprises a resin and curing agent packed in a plastic container. Remove the lid from the container and remove the ‘top chamber’ which contains the curing agent. Tip the contents of the top chamber into the container, mixing with the resin. Mix thoroughly using a wide bladed tool – a piece of batten is ideal. Scrape around the sides and bottom of the container to ensure the product is well mixed. This is fine for a small number of units. If you have multiple packs to mix we recommend a paint stirrer in a slow speed electric drill.


Important – once the contents of the pack have been mixed, a chemical reaction takes place which creates heat, and the product should therefore be decanted into a roller tray and used immediately. 

Best results are obtained in warm (minimum of 15°C), dry conditions with good ventilation. Apply with a medium pile roller, (not foam), working well in the surface of the concrete. One thick (250 microns) coat is usually sufficient. The coating should cover the substrate leaving no pin holes or missed patches. Most reasonable quality new concrete will cover successfully with one coat. Inspect the surface once the first coat has dried. Apply a second coat to cover any patches which may have been missed or where trapped air has caused pinholes. The product contains special wetting agents which help prevent air bubbles forming on most concrete surfaces.

Repairs/Resurfacing – If the intention is to apply a floor screed or resurfacer, such as Watco Flowtop®, or Concrex® to the Epoxy Damp Proof Membrane then 2 coats are required. Please blind the second coat with dry sand to provide a key for the overlay material.

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€190.65 (Ex VAT)

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Watco Epoxy Damp Proof Membrane