ARDEX W 820 SUPERFINISH Universal Finishing Compound White 25kg
£66.60 inc. VAT
£55.50 ex. VAT
- Product ID: 56168
- Suitable For: fast-track installations when covering larger areas
- Area of use: INT
- Application Method: trowel
- Volume: 25KG
- Container Type: bag
- Type: plaster
- Colour: white
- Brand: Ardex
- Manufactuer: Ardex
- Box Size: 1
ARDEX W 820 SUPERFINISH is a brilliant white, rapid-hardening, polymer-modified gypsum-based compound designed for filling, smoothing, and finishing interior walls and ceilings in dry areas. This versatile product can be applied in both thin and thick layers, thanks to its non-shrink formulation, making it an ideal surface for subsequent paint, wallpaper, and decorative finishes. It can be easily applied by hand, roller, or spray methods, making it suitable for fast-track installations over larger areas and for creating decorative designs. ARDEX W 820 SUPERFINISH is compatible with various substrates, including plasterboards, pre-rendered walls, suitable concrete backgrounds, aerated concrete, lightweight blocks, construction boards, and for filling joints in plasterboards and prefabricated concrete slabs.
Key Points:
- Versatile Application: ARDEX W 820 SUPERFINISH can be applied by hand, roller, or spray, making it suitable for different finishing techniques.
- Non-Shrink Formulation: Its rapid-hardening, non-shrink formulation allows for both thin and thick applications, creating a solid background for paints and wallpapers.
- Fast-Track Installation: Ideal for large areas and quick applications, it helps speed up the installation process.
- Wide Compatibility: This compound can be used on a variety of substrates, including plasterboards, pre-rendered walls, aerated concrete, and for filling joints in various surfaces.
Coverage:
- Approximately 14 m² at 2 mm thickness (roller application).
- Approximately 9 m² at 3 mm thickness (spray application).
- Approximately 26 m² at 1 mm thickness (hand application).
Storage and Shelf Life: This product should be stored in its original packaging, elevated off the ground, in cool, dry conditions, and shielded from extreme temperatures. When stored properly, it has a shelf life of 12 months. Make sure to reseal any partially used bags.
- Non-Combustible: Rated A1 in accordance with EN 13501-1.
- Standards Compliance: Conforms to EN 13963: 2014 for jointing material for gypsum boards.
- Gypsum Standards: Meets the requirements of EN 13279-1 for gypsum binders and plasters, including definitions and specifications.
For more in our range of plasters, please click here. For our full range of Ardex products, click here.
Alternatively, you can visit the Ardex wesite by clicking here.
ARDEX W 820 SUPERFINISH offers versatile application methods, allowing it to be applied by hand, roller, or spray to plaster, walls, and ceilings. It is particularly well-suited for fast-track installations when covering larger areas and can also be utilized for creating decorative designs. This product can be applied to a variety of substrates, including:
- Plasterboards
- Pre-rendered walls
- Suitable concrete backgrounds
- Aerated concrete
- Lightweight blocks
- Construction boards
- Joints in plasterboards and prefabricated concrete slabs
- Plaster
Substrate Preparation: Before application, ensure that surfaces are rigid, dry, clean, and free from dust, grease, and any barriers to adhesion. ARDEX W 820 SUPERFINISH adheres directly to plasterboards, absorbent construction boards, cement/sand renders, and gypsum-based plasters without the need for priming. However, concrete or highly absorbent surfaces may require priming with ARDEX P 51 Concentrated Water-Based Primer and Bonding Agent, diluted at a ratio of 3 parts water to 1 part primer. Apply this mixture with a brush and allow it to dry. For smooth and dense surfaces, such as varnished finishes or oil-based paints, priming may be necessary using either ARDEX P 82 Water-Based Epoxy Primer or ARDEX P 4 Ready Mixed Rapid Drying Multi-Purpose Primer. It’s important to use compatible primers, and if there is any uncertainty, a trial application is recommended.
Mixing Instructions: Gradually add the powder to clean water while stirring continuously; using a drill with an appropriate spiral mixing paddle is recommended. Depending on the desired consistency, use 14.75 to 16 liters of water per 25kg bag for roller application, and 12.5 to 14 liters for spray application. After mixing, allow the product to stand for 2-3 minutes to ensure the additives dissolve completely, then remix to a smooth, creamy consistency. For roller application, utilize a coarse pile roller (20mm) and apply the mixed product vertically, ensuring full coverage. After the first application dries, apply a second coat at right angles and smooth while fresh with a smoothing blade or steel float.
Application Techniques: Small quantities can be mixed by hand by adding 2 parts of powder to 1 part of clean water and mixing thoroughly. Apply ARDEX W 820 SUPERFINISH with various tools, including a notched or smooth steel trowel, coarse roller, spray pump, blade, or filling knife. Notched trowel and roller applications should be smoothed afterward with a large straight edge or smoothing blade. Ensure that application occurs at temperatures above 5°C. For filling holes, the product can be applied up to 20mm thick, with gradual filling from the edges to minimize air bubbles. Any imperfections should be corrected with a damp sponge before the product dries, which eliminates the need for sanding. If desired, the hardened product can be sanded or a subsequent coat applied.
Reinforcement Recommendations: While the installation of reinforcing mesh or tapes is not always necessary, their use is advisable for certain applications to ensure added durability and stability.
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| Elementlength | |||||||
| up to 1,5 m |
up to 2,5 m |
up to 3,5 m |
up to 4,5 m |
up to 2,5 m |
up to 3,5 m |
up to 4,5 m |
|
| Type of window frame material |
Minimum witdth of joints for a butled mounting b in mm |
Minimum witdth of joints for a inner mounting b in mm |
|||||
| Hard PVC (white) | 10 | 15 | 20 | 25 | 10 | 10 | 15 |
| Hard PVC and PMMA (dark) (colour extruded) |
15 | 20 | 25 | 30 | 10 | 15 | 20 |
| Hard PUR integral foam | 10 | 10 | 15 | 20 | 10 | 10 | 15 |
| Wood-aluminium-window | 10 | 10 | 15 | 20 | 10 | 10 | 15 |
| Aluminium-plastic sandwich frame (bright) |
10 | 10 | 15 | 20 | 10 | 10 | 15 |
| Aluminium-plastic sandwich frame (dark) |
10 | 15 | 20 | 25 | 10 | 10 | 15 |
| Wooden window frame | 10 | 10 | 10 | 10 | 10 | 10 | 10 |
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