PermaSEAL 3 Damp Proof Membrane Kit 10m²
Rating: 92 / 100
This high quality damp proof membrane kit contains all you need to protect internal walls against damp & the reappearance of salts. It is specifically designed for application on to damp walls to isolate them from new finishes.

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Availability: >In stock


RRP £130.00 Ex VAT
£87.50 Ex VAT £105.00 Inc VAT

Damp Proof Membrane Kit - 10m²

Our damp proof membrane kit is specifically designed for application on to internal damp walls to isolate them from new finishes. The 3mm meshed membrane provides a firm key and impermeable barrier on any damp or deteriorating surface.

The membrane can be installed straight after the insertion of a new damp proof course. It can be rendered or dot and dabbed immediately after completion of the membrane installation, significantly cutting down the time of the remedial work. 

The Damp Proofing Kit includes:

  • 1 x Roll of PermaSEAL 1m x 10m 3mm Meshed Membrane (10m²)
  • 200 x PermaSEAL Plaster Plugs 50mm
  • 200 x PermaSEAL Sealing washers
  • 1 x 7mm Masonry Drill bit

How Damp Proof Membranes Work 

After the underlying damp issue is resolved, the damp proof membrane is applied to create a physical barrier between the old surface finish and the new internal finish. The 3mm membrane is impervious to moisture and moisture vapour. This prevents any future discolouration and salt deposits on the surface plaster and decoration.

Damp Proof Membrane Installation

Once the new injection damp proof course has been injected, you can simply apply the membrane to the walls affected then either dot and dab or render directly to it.

  1. Clean the substrate to obtain as flat a surface as possible. Remove any damaged, loose or crumbling plaster.
  2. Cut the membrane to size with a sharp knife or scissors.
  3. Fix the 3mm membrane (with the mesh facing outward) to a surface with plugs. It can be fitted horizontally or vertically.

Jointing - The 3mm membrane can be easily bent around corners as it is a very flexible material. Alternatively, it can be butt jointed. 

Finishing - Plasterboard panels can be fixed to the membrane by the dot and dab method, giving a dry surface ready for immediate decoration.

Although plasterboard is the most popular option, plywood boards and other moisture resistant boards can be used.

For more information on all aspects of installation including jointing and finishing, which plaster to apply and how to avoid bridging view the Download tab.

Damp Proofing Internal Walls Video:

Watch this video to see just how easy it is to install a damp proof membrane to protect your internal walls from damp.


Related Content

Read our Causes of Damp Guide and our How to Complete Internal Damp Proofing for more on damp proof membranes and resolving issues with damp.


  • Can be used on virtually any internal surface
  • Provides a good key for new finishes
  • Impenetrable barrier for damp & salts
  • Provides long lasting protection, and is effective for the remaining life of the building
  • Increases the insulation of the room
  • Bridges cracks in the substrate
  • Can be decorated as soon as installation is completed
  • Speeds up remedial and redecoration work
  • Can easily be bent round corners
Model: PSDPK10
Manufacturer: Permagard
Packaging: as a kit
Size: 1m x 10m x 3mm
Coverage: 10m²
Country of Manufacture: United Kingdom

Need more information?

Speak to our technical experts.
0117 982 3282

The permagard was brilliant to use

Very easy to use and looks as though it will do the job. Excellent customer service too.

Kit has been upgraded

At Permagard we listen to our customers, due to customer reviews and feed back of our damp proof membrane kit we have increased the amount of plugs supplied up to 200 now with seals!

Please keep the reviews coming so we can continue to make our products even better!

The Permagard Team

good stuff but could be better

this is a good quality kit,and it works.

however i found an 8.5mm drill bit was needed,any smaller and the plugs dont go in,the plugs are a little flimsy and bend,unless the hole is big enough.

needs fixing every 120mm i find or it feels loose against the wall.

you will need another bag of plugs with the kit.

but all in all im happy with this product,and being a professional damp proofer/renovation company,i can see us using this over cement based tanking.

Best kit out there

I was expecting the job to be difficult and time-consuming but I was pleasantly surprised.It was the first time I had used a kit like this before but it was so simple and easy to complete. Fast delivery too, cheers.

if you want to do it right, use this

just re done someone else's poor work, damp proofing failed, they drilled and rendered the walls but damp came back as they didn't do it correctly, i've just chopped off there work and re drilled and injected myself, fitted the above kit which was easy to cut to size and use on my own, first time i'd used it as well tbh.
gave the customer a option of wet plaster or dot and dab and they went with the dry solution which can be decorated sooner, fixed really well, could have done with some more fixing for me in the kit but then again i like to use plenty, loads of mastic, so maybe one tube of mastic less and more fixing?

wished i'd had this years ago, could have saved me loads of time and seems to be a lot better job, as im the one who will be also decorating and putting skirting back, this is quicker and for me loads better, clean and hardly any waste, apart from one tube of mastic left, as long as you remind the plumbers and other trades to mastic any holes they drill into it afterwards rads etc, can't see this going wrong in my life time.

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