Description
Brush-Applied Airtight & Vapour Tight Membrane
Soudatight LQ is a premium fibre-reinforced polymer membrane designed to create airtight and vapour-tight seals around construction joints, connections and building envelope details. Applied by brush, the liquid membrane forms a seamless, flexible barrier after curing, helping to improve airtightness and energy efficiency in both new-build and refurbishment projects.
The fibre-reinforced formulation bridges cracks up to 5mm while maintaining flexibility after curing. Suitable for both internal and external applications, Soudatight LQ adheres to a wide range of common construction materials and can be painted or plastered once dry.
Available in black and white versions, the black membrane provides a visual curing indicator by changing colour from blue to black during drying, helping installers confirm complete coverage.
Key Features & Benefits
- Fibre-reinforced polymer membrane
- Airtight membrane system
- Vapour-tight membrane
- Brush-applied application
- Creates a seamless membrane
- Bridges cracks up to 5mm
- Suitable for internal and external use
- Permanently flexible after curing
- Excellent ageing resistance
- Excellent moisture resistance
- Superior adhesion to many building materials
- Paintable after curing
- Plasterable after curing
- Solvent-free formulation
- Weather resistant
- UV resistant for up to 3 months
- Available in black and white versions
- Black version changes from blue to black during curing
Suitable Applications
- Airtight sealing of floor-to-wall joints
- Airtight sealing of wall-to-ceiling joints
- Window connection sealing
- Door connection sealing
- Building envelope detailing
- Construction joints and connections
- Air barrier installations
- New-build airtightness projects
- Refurbishment projects
- Alternative to internal airtight tapes within approved systems
- Window and door installation systems
Suitable Substrates
- Mineral substrates
- Concrete
- Masonry
- Brickwork
- Plaster
- Timber
- Aluminium
- PVC
- Foils
- Non-woven membranes
- Common building materials
Technical Information
- Base: Fibre-reinforced polymer
- Application Method: Brush applied
- Membrane Type: Airtight and vapour-tight
- Crack Bridging: Up to 5mm
- Flexible After Curing: Yes
- Paintable: Yes
- Plasterable: Yes
- Solvent-Free: Yes
- Weather Resistant: Yes
- UV Resistance: Up to 3 months
- Interior Use: Yes
- Exterior Use: Yes
Frequently Asked Questions
What is Soudatight LQ used for?
Soudatight LQ is used to create airtight and vapour-tight seals around joints, connections, window installations and building envelope details.
Can it bridge cracks?
Yes. The fibre-reinforced formulation can bridge cracks up to 5mm.
Can it be used indoors and outdoors?
Yes. It is suitable for both interior and exterior applications.
Can the membrane be painted or plastered?
Yes. Once fully cured, Soudatight LQ can be painted or plastered over.
What is the benefit of the black version?
The black version changes colour from blue to black during drying, making it easier to verify complete coverage.
What materials will it adhere to?
It adheres to most mineral substrates as well as timber, aluminium, PVC, foils and non-woven membranes.
TDS
Payment & Security
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
Security
You may also be interested in
Recently viewed
What Our Customers Say