INFO → Liquid applied waterproof membranes are single or 2 parts polyurethanes available in liquid forms of Solvent (Oil) Base and/or Water Base which are easy application, ready to use, seamless and fast cure.
USES → Quality high-end polyurethanes are designed for variety of uses. Interior, exterior, exposed, under-tile, wall, floor, retaining walls, immersed, tunnels and roofs.
SUBSTRATES → Generally Polyurethanes would require specific primers for different substrates unless designed primer less. Applications extend to metal with metal etch primers, Dincel with PVC primers and timber with epoxy primers. You also need to prime concrete, cement sheets, compressed etc for a better adhesion of the membrane.Â
OIL (SOLVENT) BASE → Made with solvent base chemicals and are seamless, extra flexible, rubbery & puncture resistant. Generally Class III membranes with extra flexibility and strength used in areas with greater risk and so is commonly used under bed in bathrooms, balconies and retaining walls.
⊗ Solvent based membranes are NOT ideal for direct stick tiling as adhesives may not adhere to the seamless rubbery finish film.
WATER BASE (ACRYLIC) → These are water based chemicals, environmentally friendly, Class I, II & III ranging from low to highly flexible, easy application & rapid cure membranes. These membranes are all rounder used under tile, in bathrooms, laundry, over screed as moisture barriers and are compatible with almost all tiling and masonry adhesives.
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TRAFFICABLE Membranes → No all liquid applied membranes are designed to withstand heavy pedestrian or vehicular traffic. Only a few premium versions with added costs are designed specifically to withstand traffic.
Read product PDS in detail about what type of traffic it is designed for. While some trafficable membranes are 3 Coat system (Primer, Membrane, Top UV or Trafficable Coat) also common types of liquid applied membranes can be made trafficable (Abrasion Resistant) with a special top coat such as Duram-Virotuff.
UV RESISTANT Membrane (Exposed-External Applications) → Almost all membranes degrade overtime when exposed to UV rays. Some liquid applied membranes are designed to withstand harsh UV rays & extreme weather and proudly echoes the type and are premium versions.Â
Again, read product PDS in detail whether it is permanently UV resistant or has an added UV resistant chemical that are good for short time. Generally UV resistant membranes are 3 Coat system i.e Primer, Membrane and UVR Top coat.