Ardex WPC – Flexible Rapid Drying Waterproof Protection Coating for Internal Wet Areas
ARDEX WPC and ARDEX WPC W are cement-based, rapid-drying waterproof protection coatings that allow tiling to commence after just 90 minutes. With an adjustable mix ratio, ARDEX WPC and ARDEX WPC W can be used to fill holes, gaps and joints, as well as for general waterproofing applications.
ARDEX WPC and ARDEX WPC W are used to waterproof backgrounds such as cement or gypsum plaster, plasterboard or wood-based materials prior to fixing tiles in domestic or commercial kitchens, showers and bathrooms.
NOTE: The use of timber-based sheets and boards should be avoided if at all possible in wet locations. Ideally, they should be replaced or oversheeted with plasterboard prior to applying ARDEX WPC or ARDEX WPC W. Timber-based sheets or boards are not recommended for use in commercial showers etc.
NOTE: Concrete floors and cement/sand screeds may also be protected from the ingress of surface water by the application of ARDEX WPC or ARDEX WPC W.
Product Specifications & Key Features:
- Density of Mix One: approx. 1.4kg/litre
- Density of Mix Two: approx. 1.3kg/litre
- Pot Life: approx. 45 minutes at 20°C
- Fix Tiles: after 90 minutes at 20°C
- Mix One: approx. 1.75kg ARDEX WPC or ARDEX WPC W Liquid + 2.5kg ARDEX WPC or ARDEX WPC W Powder per m² at 3mm thickness i.e. 4.25kg per m² at 3mm
- Mix Two: approx. 0.75kg ARDEX WPC or ARDEX WPC W Liquid + 0.75kg ARDEX WPC or ARDEX WPC W Powder per m² at 0.8mm thickness i.e. 1.5kg per m² at 0.8mm or 6.6m² per 10kg unit at 0.8mm
Use Mix One for application with a spatula, pallet knife or trowel for sealing joints in corners and filling holes and gaps around fixtures, pipes, etc., prior to applying two coats of Mix Two. Where joints tend to crack, they should be reinforced with ARDEX Mesh Scrim Tape prior to applying Mix One. To fill uneven areas with a trowel, a single application of Mix One, at least 3mm thick, is required to obtain an effective waterproof protection coat (no overcoating with Mix Two is necessary).
Mix Two should be used to give a complete coating on the surface, applying it evenly with a paintbrush or roller, and working the material well into the corners with a brush. To obtain an effective waterproof protection layer, a second coat will be necessary and the total thickness should be at least 0.8mm. The second coat of Mix Two can be applied approximately 30 minutes after the first coat. Ceramic tiles, mosaics, etc., can be fixed onto the second coat after approximately 1 hour at 20°C.
Do not apply ARDEX WPC or ARDEX WPC W at temperatures below 5°C. The drying time will be shortened at high temperatures and extended at low temperatures.
Packaging, Storage and Shelf Life:
ARDEX WPC Liquid is packaged in polyethylene containers – net weight 5kg. ARDEX WPC Powder is packaged in paper sacks incorporating a polyethylene liner – net weight 5kg.
ARDEX WPC and ARDEX WPC W must be stored in unopened packaging, clear of the ground in cool dry conditions and be protected from excessive draught. If stored correctly, as detailed above, the shelf life is 12 months from the date shown on the packaging.