Epoxy Damp Proof Membrane 5kg
Rating: 88 / 100
A two-component, solvent free, low odour liquid epoxy DPM that is tolerant of residual moisture in concrete floors. When dry it creates a new damp proof layer across the floor surface protecting the future covering from damp.

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Availability: >In stock


RRP £99.50 Ex VAT
£74.50 Ex VAT £89.40 Inc VAT

Liquid Epoxy Damp Proof Membrane - 5kg

This Epoxy DPM is a two-component, solvent-free, low odour epoxy resin membrane that is tolerant of residual moisture in concrete floors. This enables earlier access onto the floor for the application of screeds, coatings and other floor coverings including tiles, vinyl, wood and carpets. Our epoxy DPM has good chemical resistance to mild chemical attack, but is designed to be over-coated with other resin finishes.

The Epoxy DPM 5kg is supplied in two 2.5kg multi chamber bags. This allows for the full 5kg or just half to be mixed at once depending on the area to be covered.

Our Epoxy DPM can be used on concrete floors and fine concrete screeds, of not less than 50mm thick in the case of un-bonded screeds. The surface should be of sufficient quality and mechanical strength to ensure an even coating.

The product can also be applied to polymers, screeds and certain types of smoothing under-layments, as long as these are well bonded. These under-layments must be stable to the effects of water. If not, then the concrete floor must contain an integral damp. proof membrane to prevent further ingress of water from the ground.

If you are laying the epoxy onto a concrete surface with an ineffective damp proof membrane or where there isn't one at all, you need to consider the possibility of hydrostatic pressure. By creating a barrier layer, you will direct the pressure/water flow elsewhere.

If you have a large epoxy DPM job, you may want to consider our Epoxy DPM 5kg Tins.

Installing an Epoxy DPM

Epoxy DPM Multi Chamber Bag Mixing Instructions

Start by making sure the mixing surface is clean and free from sharp objects that could pierce the bag. Open the outer silver packaging along the perforation and remove the transparent multi-chamber bag.

Lay the bag out and pull the rubber dividing strip away from its plastic holder. This allows both liquid sections to flow freely into each other.

Important Note: Once this process has started the Epoxy DPM must be laid onto the concrete within 10 - 25 minutes depending on substrate and air temperature. The warmer the temperature the quicker the product will start to go off.

Mix the two components together by kneading the contents of the bag intensively for at least of 60 seconds. Don’t exert too much pressure on the bag to prevent it from bursting. A uniform resin should be achieved. Make sure both colour liquids mix evenly and there are no streaks. Remove the screw cap and tamper proof ring from the bag.

Pour the contents of the bag into a suitable container / roller tray or directly onto the substrate ready to be spread.

Alternative Mixing Instructions - Remove the rubber dividing strip and pour the entire contents of the bag into a suitable container and mix the contents using a slow speed electric mixer. Mix for at least 2 minutes. The Epoxy DPM is now ready to be applied to the substrate.



Epoxy DPM Application

Epoxy Damp Proof Membrane is always installed in a minimum of two coats 24 - 48 hours apart. For floors with a high RH Reading above 92% three coats are required. Once mixed the product has a usable life of approximately 10-25 minutes max depending on site conditions. Past this point the product cannot be used for further coats.

Epoxy Damp Proof Membrane is applied at 200 micron thickness (0.2mm) per coat. Although the epoxy will tolerate slight variations to this, we would not advise that it is applied above 0.5mm thickness as this could result in bubbling and curing issues.

Liquid Epoxy Damp Proof Membrane dries clear, if you require a coloured finish we recommend 2 coats of Epoxy Resin Floor Coating after Liquid Epoxy Damp Proof Membrane has been installed.

If you wish to lay tiles or adhere any further coatings including self levelling compounds on top of this coating we advise that you blind the final coat of Liquid Epoxy Damp Proof Membrane with Fine Quartz Aggregate 30 minutes after laying the coat to provide a key for the tile adhesive or grout to bond to.

Permagard – Providing Solutions. Inspiring Confidence.

If you need any technical advice on epoxy flooring or laying an epoxy DPM then give our expert team a call on 0117 982 3282.


  • Improved formulation
  • Convenient packaging
  • Easy application
  • Application onto substrates with hygrometer readings up to 97%
  • Solvent free
  • Low odour
  • Excellent adhesion
Model: ERDPM5
Manufacturer: Permagard
Packaging: Supplied as 2 x 2.5kg multi chamber bags. (5kg) in a box.
Size: Supplied as 2 x 2.5kg multi chamber bags. (5kg)
Dilution: Follow the multi chamber bag mixing instructions. Can be mixed by hand as per instructions.
Coverage: Each 2.5 kg Multi chamber bag (two supplied) will cover 8-10m² each. Total of 16-20m² per 5kg pack per coat (minimum of 2 required) dependent on substrate condition.
Country of Manufacture: United Kingdom

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0117 982 3282

Great product

I was worried a dpc under a concrete floor was allowing moisture through. I had never used this before and was a bit nervous about using it. I was concerned about drying times but no problems at all. Completely hard after 24 hours at a temperature of only 12 degrees. Completely happy and would use again. A lot cheaper than ripping the floor up.

Damp garage floor with no DPM and a novice...

I needed to cover my garage floor with a DPM, i thought about a new screed on top of a plastic membrane but did not want the floor height increased. I found this when searching the internet and thought i would give it a try. WOW, what an amazing product. I was very nervous about laying the first coat, in case it did not dry or set correctly. I have had bad experiences with self levelling compounds not setting and having to be lifted up...so after about 12 hours i checked the floor. It looked like glass, still a liquid. Only when i touched it i realised that it dries like this. It looks excellent. A smooth finish that has taken out some of the sharp concrete finish of the floor. Mixed the second coat and applied slightly thicker this time, does exactly what you expect it to. Perfect solution for a damp floor with no DPM. Very pleased with the finish and quality, slightly expensive but it works very very well. Applied using a roller and brush at the room edges. extremely easy to apply although for the second coat you will struggle to see where you have been. I did step into the product a couple of times trying to find the wet edge. If you need to use this stuff, i cannot recommend enough. 10 *s

Solved our damp problem!

We moved into an older house and on pulling up some vinyl in the conservatory found out there was a bit of a damp problem. As the conservatory was built ad-hoc by the owner about 20 years ago it became clear that there was no dpm installed. We didn't want to rip up the entire concrete floor to treat it but we couldn't put anything on top of it either so we looked into liquid dpm options. Many of the others required a further layer of screed on top of the dpm, as it was fragile, and we didn't have the height to add another layer so finding this stuff was perfect as vinyl can be laid directly on top given that it drys hard. We mixed half of it and used a small nap roller to apply, giving it 20 hours to dry, before mixing up the rest for the second layer (we mixed it in a separate bucket as the instructions say not to mix in the cans otherwise it needs to be used quickly). We kept the room as warm as possible with a little heater and after the first night it was still a little tacky, although definitely drying, and by the second night it was rock hard. There is no more damp coming through and we can rest easy putting the vinyl down so would fully recommend if you are in a similar situation to us.

Also, on price, whilst it does seem a lot relative to others at first glance, do bear in mind that this covers a lot more ground than others claimed to. We only need 1 tub of this but would have needed 3 tubs of the other 5 litre liquid dpms, plus no screed, so good value overall, even if it is still a bit pricey.


Permagard Reply:

Hi Katy - thanks so much for taking to leave such a detailed review. We really appreciate this level of feedback and we know other customers do too. Also, great news that the product did the job. Many thanks Steve

Seems a good product

I was using it on a concrete floor which had resin anchors sticking up, so it was difficult to add an ordinary polythene DPM. The initial sample I tried took forever to dry (3 days to non-tackie), at concrete temperature 7C and room temperature 10C. I warmed the room to 10C & 15C respectively and found it was 1 day to just non-tackie (overcoatable) and 2 days to just walk on, and 4 days to reasonably hard.
Very good surface and bonding to concrete slab.

good product

used on a shop floor which had to be trafficked the next day, went off without any drying issues so don't understand why others are experiencing delayed drying times, may be because they didn't use all of both parts mixed together?
No need to flood the floor, just apply and scrape back residue with metal float, second coat is even easier to apply, does what it should at a fraction of the price of the Ardurit product

Seems okay so far

we bought this for a floor affected but not badly damp. Timely delivery, easy to mix and spread. Nightmare to dry....4 days now and its still tacky. I accept it is cooler now and a little more damp but if I had known it delayed curing this long I would have looked at something else.

We are DIY amateurs, used this on a damp, poor quality old concrete floor with no dpm

Used on poor quality, old concrete floor which had no dpm so was often damp and produced growths of crystalline salts. We were apprehensive about applying it but found it much easier than expected, despite our DIY inexperience. Not too smelly! Our problem was getting the floor temperature high enough for the resin to set, since it was winter and an unheated room. A year on it has done a great job: a shiny clear surface which is dry, tough and non-dusting. Just one small area where it hasn't gripped: an old stone set in the floor in front of the fireplace and probably soaked in grease and fireblack, so not surprised. Overall, very pleased with the outcome.

Good product review

This product is of exceptional quality and standard and was cheaper at Permagard than other online retailer. It left no odour and was really easy to apply. Really pleased with the results.

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