Holds back rising damp on new or old concrete floors
Epoxy Damp Proof Membrane can be used on new or old concrete and sand and cement floors to hold back damp.
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 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 Build, Chemi-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.
|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|
|Wet film thickness||250 microns.|
|Dry film thickness||250 microns|
|Curing time||16 hours at 15°C|
|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.