The Sikaplan® VOC gas barrier range of products provide waterproofing, ground gas and VOC protection all in one system. Comprising a pre-applied bonded membrane, post-applied adhered membrane and loose-laid membrane for both ground-level and below-ground applications.

Sikaplan®-1651 Loose VOC Gas Barrier

A loose laid VOC Gas Barrier which has exceptionally high resistance to ground gas and VOCs.

Sikaplan®-1651 Loose VOC Gas Barrier is typically used for the gas and waterproofing of ground-level structures where harmful ground gases are anticipated.

Sikaplan®-1652 Bonded VOC Gas Barrier

A pre-applied fully-bonded waterproofing membrane incorporating the Sikaplan®-1651 VOC Gas Barrier and a heavy-duty virgin polypropylene geotextile.

The geotextile is laminated to the membrane to provide a dual function; protecting the membrane from damage, and providing an integrated bond to poured concrete, ensuring a fully-bonded waterproofing barrier which has exceptionally high resistance to ground gas and VOCs.

Sikaplan®-1652 Bonded VOC Gas Barrier is used for the gas and waterproofing of underground structures where harmful ground gases are anticipated.

Sikaplan®-1653 Adhered VOC Gas Barrier

A self-adhesive version of the Sikaplan® VOC Gas Barrier. It is composed of Sikaplan®-1651 VOC Gas Barrier with a self-adhesive bitumen surface finish covered by a protective release film.

Sikaplan®-1653 Adhered VOC Gas Barrier is used for the gas and waterproofing of underground structures where harmful ground gases are anticipated, as a post-applied bonded membrane.

Standards and approvals

Sikaplan® VOC Gas Barriers are extensively tested to withstand the most aggressive of environments, and are approved to the standards below.

  • CIRIA C748 – Guidance on the use of plastic membranes as VOC vapour barriers
  • BS 8485:2015 + A1:2019 – Code of practice for the design of protective measures for methane and carbon dioxide ground gases for new buildings.
  • BR211 (2015) – Radon: Protective measures for new buildings.
  • Declaration of Performance (DoP)to EN 13967:2012.
  • BBA certificate number 19/5681.

Product installation

All the products in this range must be welded to provide a watertight and gas-resistant seal. Welding is an essential requirement because hydrocarbons can affect the long-term performance of butyl and bitumen tapes.

In all cases, the installation of Sikaplan® VOC Gas Barrier membranes should be completed by a suitably qualified and accredited installer (NVQ level 2) and independently validated in accordance with CIRIA C735:2014.

If you would like us to recommend a specialist contractor, get in touch by calling 0800 292 2572 or by emailing waterproofing@uk.sika.com.

Available system components and accessories

  • Sikaplan®-1651 VOC External and Internal Corners – Available in a 495mm x 495mm internal and external corners.
  • Sikaplan®-1652 VOC Edge Strip – 1m wide strip of Sikaplan®- 1652 Bonded VOC Gas Barrier for use on edges and kicker details to facilitate the transition from horizontal to vertical application. Used in conjunction with the corner units.
  • Sikaplan®-1652 VOC Weld Strip – As an optional strip for welding membranes.
  • Sikadur®-32 – Gas-resistant epoxy resin for sealing over pile heads.
  • Sika® Drain 850 Geo – A 2.44m wide heavy-duty drainage and protection sheet to safeguard the membrane and provide a drainage pathway to a maintainable land drain, alleviating pore water pressure on the structure.
  • Sika® BentoShield® Paste – Water-resistant bentonite detailing compound, for use around penetrations and perforations.
  • Sika® BituSeal Primer – To prime substrate prior to application of the Sikaplan®-1653 Adhered VOC Gas Barrier.