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A ready-to-use, styrene butadiene latex-based, liquid-applied gas membrane. It offers continuous protection against the ingress of radon, methane, carbon dioxide, ground gas, volatile organic compounds (VOCs), air and moisture into buildings. As the product is a barrier to moisture, it can also be used as a damp-proof membrane (DPM) on walls and floors.

The membrane can be applied by brush, roller or airless spray. A minimum dry-coated thickness of 1.0 mm is needed to provide a gas barrier. To achieve this, a total of 2 kg/m² is required. It should not be applied in wet conditions or in temperatures below 7°C.

Delta Memtech LGB is compatible with loose laid membranes supplied by Delta Membrane Systems Ltd, such as Delta Memtech M1, Delta Memtech R1,Delta MS Membranes and Delta Memtech-TITAN.


  • Gas-proof against radon, carbon dioxide, methane and other contaminants.
  • Resistant to moisture, acting as a DPM.
  • Supplied ready to use.
  • Can be used on most building surfaces.
  • Touch dry in 1–2 hours.
  • Suitable for light traffic areas and for use as gas protection for NHBC Green, Amber 1 and Amber 2 site characterisations.

Standard product features



Applied thickness:

>1.0 mm.

Technical characteristics:

  • Form supplied: Viscous liquid.
  • Chemical composition: Advanced SBS with specialty additives.
  • Water tightness (to EN 1296, EN 1367, EN 1928): Pass.
  • Radon permeability: >1.0 mm applied thickness provides a complete barrier to Radon.
  • Methane permeability (to BS EN ISO 15105-1): 0.01 ml/m²/day/atm.

NBS Specification

NBS Create logo
This product is associated with the following NBS Create clause:
45-55-12/365 Cold applied bitumen solutions

Product specification

An important note about specifying



Delta Membrane Systems Ltd


+44 (0)1992 523523

Product reference

Delta Memtech LGB

Manufacturer details

Delta House,
Merlin Way,
North Weald,
Essex, CM16 6HR
Tel +44 (0)1992 523523
Fax +44 (0)1992 523250
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