The Drybase Liquid-Applied DPM is a liquid, polymer-based barrier coating that can be applied to resist penetration of water, gas, salts and other liquids through masonry, stone and concrete.
The Drybase polymer blend delivers high integrity, elasticity and durability to the finished membrane.
The DPM (damp proof membrane) is water resistant to 20 metres head of positive pressure, and 10 times more resistant to methane than low-density polyethylene.
Damp proof membrane
Drybase Liquid-Applied DPM is supplied as a ready-to-use single pack system that is water-based, solvent free and available in black or white.
The product is applied in two coats and comes in 5l buckets, with each bucket covering approximately 4.5m2. Following application, the product cures to form a membrane that is flexible and elastic and is typically dry within one hour.
Protection against water from the ground
To provide a vapour barrier, a minimum thickness of 0.6mm dry film (1.1mm wet) is required. In order to comply with CP102:1973 (Code of Practice for the Protection of Buildings against Water from the Ground), this should be applied in a minimum of two coats.
The first coat should not be given more than 24 hours to dry before applying the second coat and, if applying a subsequent screen to the DPM, the second coat may be used as a primer.
Application of the membrane should not be undertaken if rain is expected before the coating can dry or if the background or air temperature is 7°C or lower.
Examples of typical applications of Drybase Liquid-Applied DPM include sealing concrete slabs prior to screening or overlaying with underlay and laminate flooring; protecting walk and floor-embedded joist ends; and forming floor and wall junction seals in wet rooms.
