Description
Larsen Waterproof Tanking Membrane is a ready-for-use, solvent-free sealing compound for the professional tanking of areas under tiling installations in wet rooms, showers and other areas at risk from water. Its thick-bodied, brush or roller-applied formulation makes it straightforward to achieve full, even coverage on both walls and floors before tiling.
Key Benefits
Being solvent-free and low odour, this membrane is comfortable to use in occupied buildings and enclosed spaces, while still delivering a robust waterproof barrier. It is touch dry in as little as 1 hour, helping to keep tiling projects moving without long delays between coats.
Applications
Ideal for power showers, wet rooms, changing areas in schools and sports facilities, and any interior floor or wall surface requiring waterproof protection before tiling — particularly areas subject to frequent or prolonged water exposure.
Performance & Features
- Ready to use straight from the tub — no mixing required
- Solvent-free, low odour formulation
- Touch dry in 1 hour
- Thick-bodied paint consistency for confident coverage
- Suitable for walls and floors
Compatibility
Use alongside Larsen Self-Adhesive Tanking Tape at corners and junctions, and Larsen tile adhesives once fully cured, for a complete, specification-backed tanking system.
Millcot supplies genuine Larsen trade products with full technical and safety datasheets, backed by knowledgeable trade support — helping you specify and install with confidence.
Key Features
- Ready-to-use liquid membrane — no mixing
- Solvent-free and low odour
- Touch dry in 1 hour
- Suitable for interior walls and floors
- White finish
- Available in 4kg and 10kg tubs to suit any size of job
Applications
- Wetroom and shower floor and wall tanking
- Domestic bathroom waterproofing before tiling
- Power shower waterproofing
- School and sports facility changing areas
- Any interior surface at risk from frequent water exposure
- Commercial and domestic wet area tanking
Technical Specifications
- Unit sizes: 4kg and 10kg tubs
- Colour: White
- Form: Thick-bodied liquid paint
- Touch dry time: 1 hour
- Application temperature: +5°C to +30°C
- Application method: Brush or roller
Refer to the full technical datasheet for coverage rates, number of coats and full curing/tiling times, as these vary with substrate porosity and site conditions.
What's Included
One ready-to-use tub of Larsen Waterproof Tanking Membrane, supplied in either a 4kg or 10kg size. Select the size that suits your job from the dropdown above.
FAQs
Does this membrane need mixing before use?
No, it is ready to use straight from the tub.
How long before it's touch dry?
Touch dry in around 1 hour, though full curing and tiling times will extend in cooler conditions — check the datasheet.
Is this membrane suitable for floors as well as walls?
Yes, it is suitable for both interior wall and floor applications.
Is it solvent-based?
No, it is a solvent-free, low odour formulation.
Which size should I order?
The 4kg tub suits smaller domestic bathrooms and en-suites, while the 10kg tub is more economical for larger wetrooms or multiple rooms — check the datasheet coverage rate to calculate quantity needed.
Can I use tanking tape with this membrane?
Yes, Larsen Self-Adhesive Tanking Tape is recommended at corners and junctions as part of a complete tanking system.