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by Symons Construction Ltd

Visqueen Ultimate VOC BLOK is a flexible membrane designed to comply with current guidance on Volatile Organic Compounds (VOCs) and ground gases.

  • Market leading membrane with no protection required
  • Conforms in full to CIRIA C748 and BS8485:2015
  • Excellent VOC & methane barrier resistance
  • Utilises Visqueen’s unique advanced barrier technology
  • Flexible even at low temperatures – limits stress cracking
  • NHBC Amber 1 compliance
  • Amber 2 compliant
  • Membrane size 2.44m x 41m x 1mm (100m2)

Ultimate VOC Blok is a flexible barrier membrane suitable in brownfield applications that are affected by aggressive chemicals such as Benzene, Toluene, Ethyl Benzene and Xylene (BTEX). 

In accordance with BS8485-2015 and C748, VOC is the only membrane that does not require a protective layer.

    The product is available in large roll formats to minimise jointing and quick installation times. The membrane is grey and black and 2.44m x 41m x 1mm (100m.), in single wound roll format and packaged in a blue outer wrap. 

    The membrane should be installed grey side up. 

    System Components

    • Visqueen Ultimate Double Sided Jointing Tape
    • Visqueen Ultimate Gas Resistant Lap Tape
    • Visqueen Ultimate Top Hat Units
    • Pro Detailing strip 300mm & 500mm

    Visqueen Ultimate VOC BLOK

    Typical Applications

    • VOC/Hydrocarbon contaminated sites in accordance with CIRIA C748
    • Carbon dioxide and methane sites in accordance with BS8485:2015+A1:2019
    • Radon affected sites in accordance with BRE211:2015
    • Damp protection in accordance with Building Regulations part C

    Visqueen is the market leader in the manufacture and supply of structural waterproofing and gas protection systems. 

    Visqueen offers complete support at every stage in the specification and supply chain process. Working to only the highest standards and through innovation and excellence as key values, 

    Visqueen remains the industry leader and is trusted as the technical authority for product standards.

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