Ardex MVS 95 Moisture Vapour Suppressant 12kg

Description Ardex MVS 95 Moisture Vapour Suppressant is a ready for use, one component, water based, dispersion coating supplied in pre-gauged 12kg units. It is supplied pigmented blue in colour to indicate uniform coverage and is waterproof when fully cured. Ardex MVS 95 is designed to suppress residual construction moisture in cementitious substrates including suitably prepared power floated concrete and cement/sand screeds. Ardex MVS 95 is designed for use as a two coat system. When fully dry, two coats of Ardex MVS 95 produces a membrane which can accommodate hygrometer readings up to 95% RH, and allows the subsequent application of Ardex Levelling and Smoothing Compounds without priming. Ardex MVS 95 can be used on heated screeds that have been installed and commissioned in accordance with BS 8204 Part 1, taking into account the recommendations in Part 4 of BS EN 1264. It is not suitable for use on direct to ground substrates without a functioning, structural damp proof membrane. Please refer to the Ardex DPM 1 C or Ardex DPM 1 C R datasheet for applications where no structural damp proof membrane exists or the relative humidity is above 95% RH. Substrate Preparation: Prior to application, the surface must be hard, surface dry, sound and free of dust, laitance, dirt and other barrier materials which are likely to impair adhesion such as paint, lime coatings, plaster and adhesive residues. Remove all surface water. Highly polished power floated concrete or concrete curing agents, admixtures, surface hardeners and the residues of these products can impair adhesion. Where doubt exists, or the compatibility is unknown, a trial adhesion test with Ardex MVS 95 should be carried out before work commences. Any incompatible curing agents, admixtures, surface hardeners or water sensitive materials such as adhesive residues or other surface contamination must be removed by grinding or contained shot blasting as appropriate. Movement Joints: Any joints or cracks in the floor subject to movement, such as structural movement joints, must not be bridged with the Ardex MVS 95. These joints should be treated with a flexible, impervious jointing system before Ardex MVS 95 is applied. Structural movement joints should be brought through to the final floor finish with a suitable movement joint detail. Cracks present in the screed or concrete substrate, that are not subject to movement but could affect the integrity of the Ardex MVS 95, must be fully stitched and sealed with the appropriate Ardex product, sand keyed whilst still wet and be allowed to cure, with any loose sand vacuumed away before the Ardex MVS 95 is applied. Application: STIR WELL BEFORE USE. Do not add water or dilute, it is ready for use. Do not use this product when the air temperature is below 10°C and/or the substrate temperature is below 5°C. Apply an even coat with a suitable short pile roller in one direction over the appropriate area (see table below). Depending on the film thickness applied, and the porosity/absorbency of the subfloor and the ambient conditions, Ardex MVS 95 may be dry in as little as 30 minutes at 20°C. These times may be extended at lower temperatures and/or in high humidity conditions. When the first coat is touch dry, apply the second coat at right angles to the first. It is essential that the applied product is a continuous film and is free from pinholes, cavities or thin patches, otherwise additional applications may be necessary. Allow to dry to a tack free film. This will take approximately 1 hour at 20°C in good drying conditions. Ardex MVS 95 should be overlaid with 3mm, to a maximum 10mm, of an Ardex Smoothing Compound to protect the film and to provide a uniform absorbent layer for subsequent floorcovering application with an appropriate Ardex Flooring Adhesive. Ardex MVS 95 must not be trafficked between coats and before the levelling and smoothing compound is applied. No more than 24 hours should be allowed to elapse. Coverage: Max RH (%) Min Film Thickness (microns) 12kg Coverage (m², 2 coats) 90 150 36 95 200 27 NOTE: Coverage will depend upon the absorbency and texture of the substrate. The coverage figures stated assume a smooth, lightly shot blasted, power floated concrete slab as a substrate. To ensure that the correct film thickness is achieved mark out the required area, either 36m² or 27m², and ensure that the entire contents of the unit is spread uniformly over the area. For smaller areas pro rata the unit e.g half a unit (6kg) applied at 150 microns will cover 18m² as a two coat application. The applied film thickness can be checked with a suitable wet film thickness gauge. To achieve a dry film thickness of 150 microns, two coats, each 150 microns thick as a wet film, will need to be applied. Smoothing and Levelling: All Ardex Levelling and Smoothing Compounds can be laid directly onto the dry Ardex MVS 95 between 2 and 24 hours after application, depending on drying conditions, without the need to prime. If this timescale is exceeded, apply a further application prior to the levelling compound. It is absolutely essential that trafficking of the dried Ardex MVS 95 is avoided and the surface protected from any contamination prior to application of the subsequent levelling compound. Apply the required Ardex Levelling Compound to a minimum of 3mm, maximum 10mm, and allow to dry. Technical Data: Density at 20°C: 1.1 Open Time: 20 minutes at 20°C Walkability and over-coating can be achieved in as little as 1 hour at 20°C and 65% RH. Drying time will be extended under cool and/or humid conditions. Colour: Blue Product Datasheet Click here to view this product on the manufacturers website.