Ardex WPM 200 Epoxy Waterproof Membrane

Description Ardex WPM 200 is a Solvent Free Epoxide Liquid Waterproof Membrane. It has been specifically developed to provide a water and water vapour barrier, or priming layer to concrete, screeded, rendered or masonry surfaces, steel and other vertical as well as horizontal hard surfaces. ARDEX WPM 200 is ideal for use in plant rooms, under raised access floors, ground floor slabs, workshops, marine protection, sewage processing areas, swimming pool surrounds and shower areas. It can be used as a FeRFA Class 2 resin floor finish or sand scatter finished as a reduced slip wearing surface. A sand scattered prepared layer of ARDEX WPM 200 can also be used as a waterproof key for tiling or rendering. ARDEX WPM 200 is a solvent free, low viscosity, two component, polymer modified epoxy liquid waterproof membrane. ARDEX WPM 200 is suitable for Type A waterproof barrier protection structures as per BS 8102. After hardening ARDEX WPM 200 produces a membrane with high inherent strength and excellent bond to appropriate substrates, including very damp concrete and screeds. ARDEX WPM 200 accommodates hygrometer readings up to 98% RH and has excellent resistance to water, grease, oil, aqueous salt solution, and spillages of a range of dilute mineral and organic acids and organic liquids and solutions. Substrate Preparation: The surface to be coated must be hard, sound and free of dust, laitance, dirt and other barrier materials such as paint, lime coatings, plaster and adhesive residues. Any existing renders, screeds or levelling/smoothing compounds not resistant to moisture must also be removed. Concrete curing agents, admixtures and surface hardeners and the residues of these products can impair adhesion. The prepared substrate should be as smooth as practical. ARDEX A46 or ARDEX A 125 can be used to fill holes and pre-smooth features and rough areas, prior to the application of ARDEX WPM 200. For the pre-smoothing of larger areas ARDEX K301 or ARDITEX NA should be considered. Use degreaser to remove polish, wax, grease, oil and similar contaminating substances, followed by thorough mechanical preparation. Steel should be suitably mechanically prepared back to bright steel e.g. S A 2%. In wet locations the steel must be protected with a suitable anticorrosion primer. Where doubt exists or the compatibility is unknown, a trial adhesion test with ARDEX WPM 200 should be carried out before work commences. ARDEX WPM 200 must not be used over a subfloor containing underfloor heating. Movement Joints: Any joints or cracks in the substrate subject to movement, such as structural movement joints, must not be bridge with ARDEX WPM 200. These joints must be treated with a flexible impervious jointing system and be carried through construction joints to the surface finish. Corners and wall/floor connections should incorporate ARDEX WPM 200 Reinforcing Tape (see ARDEX WPM 200 detail schematics for more guidance). For further design guidance refer to BS 8102 and BS 8215. Mixing: The individual components of ARDEX WPM 200 should be thoroughly stirred before being mixed together. The entire contents of the hardener container (Component B) should be poured into the resin container (Component A) and the two materials mixed thoroughly for at least 3 minutes using a heavy-duty slow-speed drill and spiral paddle. Some of the mixed components should be reintroduced back into the hardener container in order to activate any residue and then poured back into the larger mixing vessel and re-mixed for 30 seconds. Mixing in this way will ensure product consistency and that any resin that remains in the containers after application will cure to allow for easier waste disposal. NOTE: Once mixed, ARDEX WPM 200 will generate heat and lose working time if it is left in the mixing container or otherwise kept in bulk. Therefore, ARDEX WPM 200 should be poured directly into a roller tray and distributed without delay to the prepared surface using a brush or short/medium pile roller. Ensure that the entire surface is coated and that ‘ponding’ of the material does not occur. If applying to a floor using a trowel, the product can be poured directly onto the floor. Do not use below 5°C. Do not add thinners or solvents. Application: ARDEX WPM 200 is a 2-coat system; the second coat can normally be applied after 8–24 hours depending upon site conditions. It is recommended that the second coat be applied at right angles to the first. For floors, apply an even coat of the mixed product by means of an appropriate notch trowel such as a 1.5mm x 5mm V-shaped notched trowel. Whilst the ARDEX WPM 200 is still wet, the serration ridges should be flattened out with a long-handled short pile paint roller, initially pre-wetted with the mixed ARDEX WPM 200. Alternatively, for floor or wall application use a brush or short/medium pile roller. Ensure that the thickness of application is not less than 200 microns per coat. This can be checked using a wet film thickness gauge. Coverage of 4m²/kg should not be exceeded. Coverage rates will be reduced by rough, porous substrates; pre-smoothing is recommended to aid application and improve yield. It is essential that the applied ARDEX WPM 200 is continuous and free from pinholes or cavities; otherwise an additional application will be necessary. Allow to cure between coats. The second coat can usually be applied approximately 8 hours after the first one. Installing Subsequent Finishes: Latex Underlayment (ARDITEX NA) Apply an even continuous coat of mixed product as per application instructions and allow to cure, usually 8 hours at 20°C. Apply a second coat of product as above, but at right angles to the first coat and allow to cure, usually 8 hours at 20°C. Apply ARDITEX NA smoothing compound to a minimum depth of 3mm, maximum 6mm to the cured product, and allow to dry. Ensure ARDITEX NA is applied within 48 hours otherwise apply ARDEX P82 Primer to the product.NOTE: If the sub-floor is not sufficiently smooth, pre-levelling can be undertaken with ARDITEX NA. Self-levelling Underlayment (ARDEX Water-based Underlayments) Apply an even continuous coat of mixed ARDEX WPM 200 as per application instructions and allow to cure, usually 8 hours at 20°C. Apply a second coat of product, but at right angles to the first coat and allow to cure, usually 8 hours at 20°C. Prime the cured product with ARDEX P82 Primer (consult Priming and Preparation data sheet) and allow to dry. Apply the required ARDEX Levelling/Smoothing Compound to a minimum depth of 3mm, maximum 6mm, and allow to dry. Installing a Bonded ARDEX Screed Mechanically prepare the concrete slab to expose a clean, sound surface. Apply an even continuous coat of mixed ARDEX WPM 200 as per application instructions and allow to cure, usually 8 hours at 20°C. Apply a second coat of ARDEX WPM 200 as above, but at right angles to the first coat. Whilst still tacky, blind with 600 micron silica sand or ARDEX Fine Aggregate and allow to cure.NOTE: Apply sufficient sand to give a key free from resin. Remove excess sand by vacuum cleaner when cured. Apply ARDEX A18 Screed Bonding Cement as a bonding agent. Overlay wet-in-wet with a screed made with ARDEX A38 Ultra Rapid Drying Cement or ARDEX A29 Rapid Drying Cement (consult the product data sheets for full detail and minimum thicknesses). Tiling and Rendering Mechanically prepare the substrate to expose a clean, sound surface. Apply an even continuous coat of mixed product as per application instructions and allow to cure, usually 8 hours at 20°C.Apply a second coat of product as above, but at right angles to the first coat. Whilst still tacky, blind with 600 micron dry silica sand or ARDEX Fine Aggregate and allow to cure.NOTE: Apply sufficient sand to give a key free from resin. Remove excess sand by vacuum cleaner when cured.Tile using an ARDEX cement-based tile adhesive suitable for the tiling application and tile size.NOTE: The product is not suitable for use in contact with potable water. Coverage:Approximately 4.8m²/litre (4m²/kg), e.g. when mixed a 5 litre unit will cover approximately 24m² per coat at 200 microns, and a 20 litre unit will cover approximately 96m² per coat at 200 microns. Technical Data: Mixing ratio: Component A: Component B 4.5:1 by weight Density at 20°C: 1.18 Working Time: 20 minutes at 20°C NOTE: Both the working time and viscosity will decrease at higher temperatures, and increase at lower temperatures. Over Coating: min 8 hours, max 24 hours at 20°C Walkability at 20°C: 6-8 hours Moisture vapour transmission rate : EN ISO 7783-1 1.6 g/m2/24hr Reverse hydrostatic pressure test: Withstands 4.3 bar (65 psi) for 14 days Product Datasheet Click here to view this product on the manufacturers website.