Ardex W820 Superfinish Universal Finishing Plaster – 25 Kg Bag

£61.98 exl. VAT

Per Unit


SKU 103061415524034250 Category

White Polymer Modified Gypsum Based Finishing Plaster.

  • Roller, spray or hand applied for fast track installation
  • Can receive finishes in as little as 5 hours
  • Clean application, no overspray
  • Easy to apply and sand
  • Solvent free


Ardex W820 Superfinish – Universal Finishing Plaster

Ardex W820 Superfinish – Universal Finishing Plaster is a brilliant white, rapid hardening, polymer modified gypsum based compound for filling, smoothing and finishing interior walls and ceilings, in dry areas.
Can be applied in thin and thick applications and, with its non-shrink formulation, it is an ideal background to apply paint, wallpaper and other decorative finishes.

Ardex W820 Superfinish  Uses

Ardex W820 can be applied in a variety of ways, by hand, roller or spray application to plaster, walls and ceilings.  Ideal for fast track installation when covering larger areas. Ardex W820 can also be used to create decorative designs.

Ardex W820 can be used on the following substrates:

  • Plasterboards
  • Pre-rendered walls
  • Suitable concrete backgrounds
  • Aerated concrete
  • Lightweight blocks
  • Construction boards
  • Filling of joints in plasterboards and prefabricated concrete slabs
  • Plaster


Small quantities can be mixed by hand. Gradually add 2 parts by volume of powder to 1 part by volume of clean water and thoroughly mix to the consistency required. Allow the product to stand for approximately 2-3 minutes after mixing to allow all of the high performance additives to fully dissolve and wet out before remixing the product to a smooth creamy consistency. Apply with a notched/smooth steel trowel, coarse roller, spray pump, blade or filling knife. Notched trowel and roller application techniques require smoothing after application to the substrate, with a large straight edge/smoothing blade to create a smooth uniform finish. All application techniques can be smoothed with a straight edge/smoothing blade. Apply at temperatures above 5°C.

All information on surface preparation, mixing, thicknesses and drying times can be found on the technical datasheet.


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For more than 60 years, ARDEX has been a quality leader for the flooring and tiling industries, the brand of choice for installers and distributors. ARDEX today is still an independent family-owned business. This means that in our permanent efforts to achieve market-shaping innovations, we have been able to retain our most important tradition: uncompromising quality. This is something we guarantee by applying the latest rigidly enforced quality assurance procedures, making it no coincidence that they are regarded as a premium partner of the construction industry. Strong internal growth and intelligent acquisitions in foreign markets have put the Group on the map with 53 subsidiaries and 3,000 employees on all continents. With its 14 major brands, the ARDEX Group generated a worldwide annual turnover in excess of 770 million euros in 2018. This marks an important milestone and they are becoming one of the world’s leading suppliers of high-quality specialist building materials.

Technical Information