ARDEX W 820 SUPERFINISH is a brilliant white, rapid hardening, polymer modified gypsum based compound for filling, smoothing and finishing interior walls and ceilings, in dry areas.
It’s non-combustible – A1 in accordance with EN 13501, conforms to EN 13963: 2014 Jointing Material for Gypsum Boards, and EN 13279-1 Gypsum binders and gypsum plasters.
- Roller, spray or trowel apply for fast track installation
- Can be used to create decorative designs
- Extended pot life, ideal for larger areas
- Receive finishes in as little as 5 hours
- Can be applied from a feather edge to 20mm in a single application
- Ideal for smoothing joints and plastering a variety of surfaces such as render, concrete, plasterboard, construction boards
- Easy to apply and sand
- Slump free
Download the latest datasheets and certificates here;
ARDEX W820 Technical Datasheet (TDS)
ARDEX W820 Health & Safety Datasheet (SDS)
ARDEX W820 Declaration of Performance (DOP)
ARDEX W820 Environmental Product Declaration (EPD)
ARDEX W820 EMICODE Certificate
ARDEX W820 Sustainability Datasheet
Mixing ratio
approx. 11-16 litres of water to 25kg powder (dependent on application method)
Following data based on mixing ratio of 1 part water: 2 parts powder:
Bulk density
approx. 1.1kg/litre
Mortar weight when freshly mixed
approx. 1.45kg/litre
Material requirement
approx: 1.0kg powder per m² per mm 11- 12.5 litres of water
0.9kg powder per m² per mm 15-16 litres of water
Working time at (20°C)
approx. 3 hours
COMPRESSIVE STRENGTH
after 28 days: approx. 4 N/mm²
TENSILE BENDING STRENGTH
after 28 days: approx. 2 N/mm²
pH value
Approx. 7
Embodied Carbon
(A1-A3 production stage as defined in BS EN 15804)
0.49 kg CO₂ eq/kg