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PermaSEAL 3 Clear Membrane 40m²

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£124.00 Ex VAT
£148.80 Inc VAT
A high quality wall and floor clear damp proofing membrane suitable for use internally primarily above ground to isolate damp walls and floors.

Clear Damp Proofing Membrane

PermaSEAL 3 Clear damp proofing membrane is a high quality, high density polyethylene (HDPE) membrane suitable for above ground damp proofing. The low profile stud depth of just 3mm makes it extremely versatile and suitable for use as both a wall and floor membrane.

PermaSEAL 3 Clear is designed for when the wall finish in front of the damp proof membrane is timber battens, metal track system or a block wall.

This clear non-meshed Damp Proofing Membrane is available in rolls of 2m x 20m = 40m². It’s also available as a convenient kit with all that you need to get the job done.

We also stock a 3mm mesh membrane, ready to take a plaster finish.

Contents of 40m² Clear Damp Proofing Kit

The PermaSEAL clear damp proofing membrane kit includes:

  • 1 x PermaSEAL 3 Clear Membrane 2m x 20m (40m²)
  • 1 x PermaSEAL Tape (for membrane jointing)
  • 2 x PermaSEAL Brick Plugs With Sealing Washers Bag of 100
  • 1 x 10mm SDS Drill Bit

Uses of clear damp proofing membrane

Our Clear 3mm damp proofing membrane is suitable for use as both a wall and floor membrane. The primary use of this low profile membrane is to isolate the wall finish from a damp wall where a meshed surface for plaster or render is not required. It can accept a range of wall and floor finishes.

  • Wall membrane - PermaSEAL Brick plugs accept screws which allow for the addition of battens and metal lath systems. This can then be insulated before the addition of plasterboard finish.
  • Floor membrane - When used as a floor membrane, PermaSEAL 3 Clear can accommodate insulation, underfloor heating, screed and floating floors.

Note: Clear membranes should be permanently protected from UV light as this can affect the membrane making it brittle and substantially shortening its service life. This applies for storage and when installed.

Benefits of our non-mesh damp proofing membrane

PermaSEAL 3 Clear is a low profile, non-mesh membrane that delivers numerous benefits, including:

  • low 3mm stud profile perfect when space is at a premium
  • isolates against salt efflorescence
  • accepts a range of wall and floor finishes including timber battens & metal lath systems
  • life expectancy of at least 50 years
  • inert product with high compressive loading stability

Installing a 3mm Clear Non-Mesh Damp Proofing Membrane

PermaSEAL 3 Clear can be installed over a wide range of substrates in varying situations. Our 3mm Clear is easy to handle and bend, and can be cut to size with scissors. Download our installation guide for full detailed instructions for installing our Clear Membrane on walls and floors. Our Guide contains details on sealing and jointing membranes as well as the recommended plug fixings for a clear damp proofing membrane.

Our innovative PermaSEAL Quick Plug or PermaSEAL Brick Plug is used when fitting the PermaSEAL 3 Clear to the wall.

PermaSEAL - Complete Solutions. Made Possible.

Our PermaSEAL 3mm clear membranes provide a complete solution to your damp proofing needs. If you have any questions around installing clear membranes or damp proofing in general, give us a call on 0117 982 3282. Our experts are on hand to answer your questions.

Related Resources

Browse our other damp proofing products or explore your treatment options for rising damp. We also stock a damp proof injection kit with all you need to complete the job.


  • Suitable as both a wall and floor membrane
  • Low profile 3mm stud depth
  • Easy to bend, form around windows, doors, vaulted ceilings etc
  • Easy to cut with scissors
  • High compressive load bearing strength 320kN/m2
  • Waterproof, salt resistant, root resistant, contaminant resistant
  • 3mm design provides 1.05 litres of drainage volume per m2
  • Low & high temperature tolerances
  • Highly resistant to water, alkalis, saline solutions, organic acids, and minerals
  • Resistant to bacteria, fungi, and other small organisms
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