RIW Gas Seal HC Data Sheet
Gas Seal HC is a 0.5mm thick, unique blended polyethylene membrane, for use where protection against ground gas and hydrocarbons are required. It can be seam welded to form a monolithic membrane, but the laps can also be sealed with a range of Gas Seal Ancillary tapes. This product is suitable for use beneath ground bearing concrete slabs and complies with the latest BS8485 and CIRIA C748 codes of practice
METHANE, CARBON DIOXIDE, VOC, HYDROCARBON, RADON AND MOISTURE BARRIER
Typical Uses of Gas Seal HC
- Complete ground gas, VOC, hydrocarbon and moisture barrier
- Suitable for use on contaminated sites
- Can be combined with passive or active sub-floor ventilation
- Applied beneath concrete ground floor slabs
Features & Benefits of Gas Seal HC
- Separate damp proof membrane not required
- Welded joints are possible
- Complies with latest codes of practice published by CIRIA & BRE
Gas Seal HC Downloads
Gas Seal HC 1
Gas Seal HC 2
Gas Seal HC 3
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Last Updated: 2026-03-22
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