Gas Barrier - Gas Membrane Systems
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Gas Protection and Waterproofing Combined
Type A waterproofing and gas combined membrane systems with full British board of agreement certifications.
Our products have been developed to enable developers and contractors to protect new buildings against gases contained in contaminated land. They are designed inline with current guidelines BS 8485 2015+A1:2019.
Sustainable and durable barrier systems, designed to protect the structure for the intended lifetime.

The gas protection membranes were developed in response to a change in Government guidance regarding ground gases and an increasing awareness of the detrimental effects to human health from hazardous chemicals residing in the ground below developments.
Radon is a colourless, odourless, radioactive gas that occurs in rocks and soils, some building materials and water. The ground is the most important source as radon can seep out and build up in houses and indoor workplaces.
Wykamol gas membrane products are able to offer full Radon protection systems and basic radon protection systems using our range of approved membranes.
VOCs Volatile Organic Compounds) and Hydrocarbons are dangerous to human health and can have long-term health effects.
JUTA UK have embarked on extensive testing to arrive at best in class gas protection membranes, which fully conforms to the latest standards.
GP®TITAN BOND
Pre-applied membrane

A pre-applied fully bonded waterproofing membrane incorporating the GP®TITAN membrane 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.
GP®TITAN BOND is used for the Gas/waterproofing and tanking of underground structures where harmful ground gases are anticipated.

GP®TITAN membranes are extensively tested and proven to withstand the most aggressive environments and provide confidence to the end user the product is suitable and fit for purpose for the needs of today, and future proofed for the demands of tomorrow. Providing a robust, durable and flexible membrane,
GP®TITAN is the optimal gas and waterproofing barrier.
When compared to the vast majority of existing TYPE A waterproofing membranes, GP®TITAN is on average, TWO THOUSAND times better performing as a ground gas barrier, as well as providing superior durability and longevity over the existing practices and proposals.
Uses
For all aspects of Gas protection and where Grade 1, 2 and 3 (waterproofing) is required as part of a single or dual system recommended in BS8102:2009.
Note: BS8102:2009 provides guidance on the consideration of gas resistance of
waterproofing systems and durability with consideration to the groundwater regime – including contaminants within.
Available Sizes
Pack Size: 1.9m x 25m
Coverage: 47.5 m²
Associated Products
1 x 25m Titan bond edging strip
Internal & external prefabricated
corners Prefabricated Top hat
Titan Tape 100mm x 10m
Key Benefits
GP®Titan Bond pre-applied membrane
- Recognised as an accepted system for ground gas and water protection by NHBC.
- VOC & Hydrocarbon barrier – The first (and currently only) membrane vailable to fully achieve the requirements of C748 for chemical testing as a bonded type A.
- Full surface contact between the membrane and concrete.
- Quick and easy installation.
- Manufactured to meet the most up to date British Standards and guidance.
- Can be installed in all weather conditions.
- Exceptional Chemical Resistance.
- High resistance to Ground Gases.
- Long Term Durability (performance guaranteed for the lifetime of the building).
- Compatible with all building materials.
- Waterproofing barrier (Type A BS8102:2009).
- Gas Barrier (Radon, Methane, Carbon Dioxide - BS8485:2015)
- Hydrocarbon (Liquid & Vapour phase) & VOC barrier (C748)
GP®TITAN TANK
Post-applied membrane

GP®TITAN TANK can be used in horizontal or vertical applications and is suitable for all ground floor and basement construction including lift pits, slabs, liner walls, capping beams & service penetrations.
GP®TITAN TANK – Self Adhesive version of the GP®TITAN; composed of self-adhesive SBS polymer modified bitumen with an upper surface finish of
GP®TITAN, and a lower surface finish of siliconized polypropylene release film.

GP®TITAN TANK is used for the Gasproofing, waterproofing and tanking of underground structures where harmful ground gases are anticipated, as a ostapplied fully bonded membrane. The GP®TITAN gas and waterproof membrane can be installed with the use of either welded or taped joints depending on the specific project requirements.
In applications where a dual system is required, outlined in NHBC Chapter 5.4
GP®TITAN BOND and GP®TITAN TANK can be used as a fully BONDED TYPE A
barrier alongside either an integrated TYPE B structural Barrier, or an internal TYPE C Cavity Drainage Membrane system. The benefit of the GP®TITAN membrane is that it does not require the TYPE B or TYPE C as part of the gas protective measures, as it is capable of providing sufficient resistance to ground gas alone. In addition, the exceptional durability proven against a range of aggressive yet common contaminants, means that as the primary ‘contact barrier’ from ground gas and water (when placed externally) the protective elements of the GP®TITAN extend to that of the Structure and Cavity Drainage Membrane, increasing the overall durability of both.
Uses
For all aspects of Gas protection and where Grade 1, 2 and 3 (waterproofing) is required as part of a single or dual system recommended in BS8102:2009.
Note: BS8102:2009 provides guidance on the consideration of gas resistance of
waterproofing systems and durability with consideration to the groundwater regime – including contaminants within
Available Sizes
Pack Size: 1m x 20m
Coverage: 20 m²
Associated Products
300mm x 20m Titan EXT Tape
GP Tape 50mm x 15m
Key Benefits
GP®Titan Tank post-applied membrane
- Recognised as an accepted system for ground gas and water protection by NHBC.
- VOC & Hydrocarbon barrier – The first (and currently only) membrane available to fully achieve the requirements of C748 for chemical testing as a bonded type A.
- Full surface contact between the membrane and concrete.
- Quick and easy installation.
- Manufactured to meet the most up to date British Standards and guidance.
- Can be installed in all weather conditions.
- Exceptional Chemical Resistance.
- High resistance to Ground Gases.
- Long Term Durability (performance guaranteed for the lifetime of the building).
- Compatible with all building materials.
- Waterproofing barrier (Type A BS8102:2009).
- Gas Barrier (Radon, Methane, Carbon Dioxide - BS8485:2015).
- Hydrocarbon (Liquid & Vapour phase) & VOC barrier (C748)
GP®TITAN FLEX
Post-applied membrane

GP® TITANFLEX is specifically designed, manufactured, tested and certified to perform as a methane, carbon dioxide, radon, ground gas, VOC, air & moisture, hydrocarbon protection system.
GP®TITAN TANK – Self Adhesive version of the GP®TITAN; composed of self-adhesive SBS polymer modified bitumen with an upper surface finish of GP®TITAN, and a lower surface finish of siliconized polypropylene release film.
GP®TITAN TANK is used for the Gasproofing, waterproofing and tanking of underground structures where harmful ground gases are anticipated, as a postapplied fully bonded membrane. The GP®TITAN gas and waterproof membrane can be installed with the use of either welded or taped joints depending on the specific project requirements.

In applications where a dual system is required, outlined in NHBC Chapter 5.4 GP®TITAN BOND and GP®TITAN TANK can be used as a fully BONDED TYPE A barrier alongside either an integrated TYPE B structural Barrier, or an internal TYPE C Cavity Drainage Membrane system.
The benefit of the GP®TITAN membrane is that it does not require the TYPE B or TYPE C as part of the gas protective measures, as it is capable of providing sufficient resistance to ground gas alone. In addition, the exceptional durability proven against a range of aggressive yet common contaminants, means that as the primary ‘contact barrier’ from ground gas and water (when placed externally) the protective elements of the GP®TITAN extend to that of the Structure and Cavity Drainage Membrane, increasing the overall durability of both.
Uses
GP TITANFLEX Membranes are satisfactory for use as gas resistant barriers to restrict the ingress of radon, methane, carbon dioxide and VOCs into buildings from landfill and naturally occurring sources. The products are chemically resistant when in contact with hydrocarbons.
Available Sizes
Roll Length: 2m x 50m
Thickness’s: 0.50, 0.75 & 1.0mm
Coverage: 100m2
Associated Products
GP Tape 50mm x 15m
Key Benefits
- Recognised as an accepted system for ground gas and water protection by NHBC.
- VOC & Hydrocarbon barrier – The first (and currently only) membrane available to fully achieve the requirements of C748 for chemical testing as a bonded type A.
- Full surface contact between the membrane and concrete.
- Quick and easy installation.
- Manufactured to meet the most up to date British Standards and guidance.
- Can be installed in all weather conditions.
- Exceptional Chemical Resistance.
- High resistance to Ground Gases.
- Long Term Durability (performance guaranteed for the lifetime of the building).
- Compatible with all building materials.
- Waterproofing barrier (Type A BS8102:2009).
- Gas Barrier (Radon, Methane, Carbon Dioxide - BS8485:2015).
- Hydrocarbon (Liquid & Vapour phase) & VOC barrier (C748)
LGM
Liquid Gas Membrane

Styrene butadiene latex based formulated liquid applied membranes offer a simple method for waterproofing, gas proofing, damp proofing and vapour proofing applications.
Wykamol Liquid Gas Membrane (LGM) is a single pack, elastomeric liquid rubber membrane, specifically designed for a range of vertical and horizontal construction surfaces, generally as follows. LGM will cure to form a tough, flexible material acting as an effective barrier to the passage of vapour, damp, water, Radon and Methane gas.
Advantages
- Single pack system
- Water based compounds that can be applied even to damp backgrounds
- Non-toxic, non-hazardous, solvent and plasticiser free
- Quick drying. Typically touch dry in 1 hour
- Good bond to many substrates
- Toughness, high flexibility, extensibility and good crack bridging properties
- Low water vapour permeability
- Alkali resistant. Can be applied to alkaline surfaces
- Resistant to silage acids
- Non staining and stain blocking
- Available colour, Green Application
Wykamol LGM Liquid Gas Paint - For further information call our technical support team on 0800 7022176.
The background surface should be smooth or have a light even texture. Any masonry should be flush pointed and defects in existing surfaces made good.
The surface needs to be clean, sound and free from dust, loose material or free surface water. The membrane should not be applied in wet conditions or where these conditions are likely to occur before the membrane has dried. The membrane should not be applied when the temperature of the background, or the air temperature, is below 7ÅãC.
It is sometimes advantages to pre-wet concrete or masonry backgrounds, so that these are damp but free from any water glistening on the surface, to aid wetting out of the background. Because of the wide variety of background types and site
conditions it is always advisable to check adhesion to the background by testing on a sample area before starting any job. The membrane may be applied by brush, roller or airless spray.
Properties
Wykamol Liquid Gas Membrane can be used to protect most building surfaces form the effect of liquid and water vapour. carbonation and as a gas barrier
to prevent the ingress of Methane. Carbon Dioxide and Radon. As the product is a barrier to moisture it can be used as a DPM on floors and walls.
Coverage
Wykamol Liquid Gas Membrane may be applied by brush, roller or airless spray. If necessary, the compound can be diluted with up to 10% water, however care should be taken to ensure that the correct dry coat thickness is applied.
The thickness of the dried membrane per coat depends on the method of application.

