Puraflex VOC Membrane

Puraflex VOC Membrane is a high performance hydrocarbon and chemical resistant barrier with exceptional resistance to a wide range of pollutants including hydrocarbons, industrial chemicals, toxic waste, natural and radioactive gases; it also acts as a high performance DPM. The membrane is generally used within construction applications, predominantly within the foundation design.


  • High performance membrane with a chemical resistant core
  • Provides additional damp proofing protection
  • Robust with excellent resistance to puncturing and tearing
  • Extensive test data available
  • Supported by the Cordek Puraflex Permeation Modeller


The most common application for Puraflex VOC Membrane is within the foundation of a building or structure that requires protection from the ingress of VOC’s, hydrocarbons and/or ground gases. However further applications include:

  • Protection of EPS lightweight structural fill and void formers
  • Lining of service trenches for protection from surrounding contaminated ground
  • Use within highway construction and associated surface drainage systems
  • Bund lining for containment of aggressive chemicals and substances
  • Protection of buried structures and tanks within contaminated ground
  • External lining of attenuation tanks


Suitable for use in conjunction with the Puraflex Tank Membrane and Puraflex DPC for the protection against the ingress of VOC’s, methane, carbon dioxide, radon and damp.

It is recommended that the Puraflex Membrane is installed with welded joints only. Cordek can provide contact details of professional, third party installers who can offer this service if required.

Product VOCs including hydrocarbons Methane Carbon Dioxide Radon
Puraflex VOC Membrane
Puraflex Tank VOC Membrane
Tri-Gas Membrane
Gas Resistant Self Adhesive Membrane
Radon Membrane


Note: All membrane types also provide damp proofing protection, however should there be the additional risk posed by hydrostatic water pressure, please contact a member of the Cordek Technical Team for additional advice.


Data Sheets

Product Issue Date Version Size Download
Puraflex VOC Membrane Data Sheet 02/2018 4 808.0 KB

MSDS Data Sheets

Product Issue Date Version Size Download
Puraflex VOC Membrane MSDS 05/2017 2 81.4 KB


Product Issue Date Version Size Download
VOC & Ground Gas Protection 01/2018 3 5.0 MB

NBS Clauses

Our NBS Clauses are hosted on the external website - view NBS Clauses

BIM Library

Please select the BIM file in the format you require.

Name IFC Size IFC Download Revit Size Revit Download
Puraflex VOC Membrane 10.8 KB 936.0 KB

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Case Study

London Bridge Station Redevelopment

Cordek were tasked with providing a solution to 7,500m³ of lightweight structural fill encapsulated within a suitably protective membrane, within a restricted timeframe.

Find you nearest Technical Advisor

For international enquiries please contact Peter Blanchard

Or contact Cordek Head Office