PermaSEAL 8 Eco X Black Cavity Drain Membrane 40m²

Black cavity drain membrane suitable for waterproofing floors and walls both internally and externally.


Availability: In stock

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RRP £230.00 Excl. VAT
£85.00 Excl. VAT £102.00 Incl. VAT

Cavity Drain Membrane for Floors & Walls - Black

PermaSEAL 8 Eco X Black is a cavity drain membrane suitable for use internally and externally, above and below ground. This high quality HDPE membrane can be used for waterproofing retaining walls, vaulted soffits and floors. It is ideal for basements and cellars as well as in above ground applications.

Due to its diagonal 8mm stud formation, this cavity drain membrane has a larger number of studs per metre squared. This increases its compressive loading stability when compared to other membranes in the PermaSEAL range, making it ideal for flooring applications.

The membrane is highly resistant to chemicals, resistant to root penetration, rot proof and neutral towards drinking water. It is also resistant to bacteria, fungi, and other small organisms.


Type C – Walls and Floor

As a cavity drain membrane, the Eco X can be used below ground as both a wall and floor membrane as part of a Type C Waterproofing System in conjunction with other PermaSEAL products. These include Drainage Channels and Sump and Pump Systems for evacuating water from a building. We also stock membrane tape, overtape and corner strips for sealing membrane joints.


The PermaSEAL black cavity drain membrane is suitable for use when constructing a Grade 3 environment in accordance with BS 8102:2009 – Protection of below ground structures against water from the ground. Read our full guide on how to comply with BS 8102 for more information.

Note: All cavity drain membranes should be permanently protected against UV Light. Failure to do this will dramatically decrease the service life of the product.


  • Quick and easy to install
  • High compressive load bearing strength 200kN/m2
  • Highly resistant to chemicals
  • Resistant to root penetration, bacteria, fungi, and other small organisms
  • Rot-proof polythene
  • Neutral towards drinking water
  • Ideal for floors and walls
Model: PS8EXB40
Manufacturer: Permagard
Packaging: individually
Size: 2m x 20m x 8mm - 40m²
Coverage: 40m²
Country of Manufacture: United Kingdom

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