Liquid Vapour Membrane is a damp proofing and waterproofing membrane suitable for application by brush, roller or airless spray. Supplied in 20 Litre (25Kg)
LVM is a styrene butadiene based single pack, general purpose, high performance, waterproofing system supplied as a black membrane coating. The membrane is flexible and elastic, resistant to light abrasion and UV light. Liquid Vapour Membrane is water based and safe to apply onto damp substrates by brush, roller or spray. Membranes are typically touch dry in one hour.
Uses include... Under self smoothing floors or thin section floor screeds.
Where the original membrane has been punctured.
Waterproofing for basement floors below ground level.
Waterproofing or tanking to walls either alone or as part of a multilayer system.
Principal waterproofing in roofing or as part of a repair system.
Under tiled areas as a secondary protection for wet areas.
For silage and sewage tanks.
To protect against carbon dioxide and methane penetration.
Directions For Use
No priming is necessary. To assist the membrane in fully wetting out the substrate; the substrate
may be dampened, however any standing water should be removed.
Stir well before use. The membrane may be applied by brush, roller or airless spray. If necessary the liquid compound may be diluted with a little water (max 5% by volume) to reduce the viscosity. Care should be taken to ensure that the correct dry coat application thickness is achieved and that the drying time is not unacceptably extended.
A minimum dry film thickness of 0.6mm is required to provide a vapour barrier. Typical coverage
value, depending on substrate, is 1.1 litres/m2. This should be applied in a minimum of two coats, each of 0.55 litres/m2, in order to comply with CP102: 1973, Code of Practice for the protection of buildings against water from the ground.
For the dry film thickness to be 0.6mm, the wet film thickness needs to be 1.1mm. This will be
achieved at a coverage rate of 1.1 litres/m2 applied in two coats each of 0.55 litres/m2 (1.2kg/m2 applied in two coats each of 0.6 kg/m2). For the application of a dry film thickness of greater than 0.3mm in a single coat it is recommended that the membrane is applied by airless spray. Using airless spray, a single application dry coat thickness up to 1mm may be achieved.
When applying two or more coats it is recommended that subsequent coats are applied at right angles to the previous coat. Before applying a second coat it is necessary to allow the first coat to become touch dry, which is typically after one hour. The second coat should be applied within 24 hours of applying the first coat. If applying a subsequent screed to Liquid Vapour Membrane, the second coat may be used as a primer for the screed.
No special curing is required. Application of the membrane should not be undertaken if rain is
expected before the coating can dry. Do not apply in temperatures below 5°C.
This product was added to our catalog on Wednesday 16 February, 2022.