ARDEX X 77 S
Tile adhesive · ARDEX
A 20 kg bag of ARDEX X 77 S covers about 5.5 m², by ARDEX UK's own figure: “Approximately 5.5m 2 at 3mm thick per 20kg bag”. ARDEX UK's other figures are in the table below.
- Coverage
- about 5.5 m² per 20 kgARDEX UK's figure
- Bag sizes
- 20 kg1 size in the catalogue
- For
- Walls and floorsin the maker's words
Where to buy it
The shops' own searches for it. BuildBatch sells nothing and compares no prices.
Search the shops for ARDEX X 77 S
- Amazon UK, opens in a new tab
- B&Q, opens in a new tab
- Homebase, opens in a new tab
- Screwfix, opens in a new tab
- Toolstation, opens in a new tab
- Wickes, opens in a new tab
Each link opens that shop’s own search for this product, in a new tab. BuildBatch earns nothing from these links. BuildBatch does not know whether a shop has it, or what it costs there today.
Coverage
ARDEX UK gives 3 figures for ARDEX X 77 S, each for the conditions in its own words. Each is the maker's own, with its source below.
| Figure | The maker's words |
|---|---|
| about 5.5 m² per 20 kg bag | “Approximately 5.5m 2 at 3mm thick per 20kg bag”ARDEX UK, ARDEX X 77 S product page, read 12 October 2026 |
| about 9.5 m² per 20 kg bag | “will cover approximately 9.5m² when using a 5mm x 5mm square toothed and notched trowel”ARDEX UK, ARDEX X 77 S product data sheet, read 12 October 2026 |
| about 1.2 kg a square metre for each mm of bed | “using approximately 1.2kg of powder per m² per mm thickness of adhesive bed”ARDEX UK, ARDEX X 77 S product data sheet, read 12 October 2026 |
When the figure runs short
- The conditions the maker names
- Each figure is for the notch, bed, tile or joint the maker names beside it. An uneven surface, a larger notch or buttering the backs of the tiles takes more.
- Waste
- None of these figures adds anything for what is left in the bucket or spilt.
Bag sizes
- 20 kg bag
Questions about ARDEX X 77 S
How much does a 20 kg bag of ARDEX X 77 S cover?
ARDEX UK states about 5.5 m² (“Approximately 5.5m 2 at 3mm thick per 20kg bag”) and about 9.5 m² (“will cover approximately 9.5m² when using a 5mm x 5mm square toothed and notched trowel”), in its ARDEX X 77 S product page, read 12 October 2026. Nothing is added for waste.
What sizes does ARDEX X 77 S come in?
The catalogue lists 20 kg bag. A shop may not stock every size.
Other tile adhesives
In alphabetical order, with each maker's own figures. A maker measures its coverage its own way, so the figures are not a test of one product against another. Every product under tile adhesive.
BAL
- Coverage
- 0.435 m²/kg
- Sizes
- 17 kg bag
BAL
- Coverage
- 0.5 m²/kg
- Sizes
- 20 kg bag
Bostik
- Coverage
- up to 7 m² per 20 kg
- Sizes
- 20 kg bag
Bostik
- Coverage
- up to 8 m² per 20 kg
- Sizes
- 20 kg bag
More from ARDEX
6 of the 17 other ARDEX products in the catalogue, by name. All ARDEX products.
- Coverage
- about 4.9 m² per 20 kg
- Sizes
- 20 kg bag
- Coverage
- about 4 m² per 22 kg
- Sizes
- 22 kg bag
- Coverage
- about 6.4 m² per 20 kg
- Sizes
- 20 kg bag
- Coverage
- about 1.1 kg/m² a mm
- Sizes
- 20 kg bag
- Coverage
- about 1.2 kg/m² a mm
- Sizes
- 20 kg bag
- Coverage
- about 5.5 m² per 20 kg
- Sizes
- 20 kg bag
Where the figures come from
- Coverage: ARDEX UK, ARDEX X 77 S product page. Read on 12 October 2026.
- Coverage: ARDEX UK, ARDEX X 77 S product data sheet. Read on 12 October 2026.
This page was written with AI tools from the maker's own documents; it is not yet checked by a tradesperson. The figures are the maker's, and a maker's figure is their best case: follow the bag's own instructions.
- Wall tile calculator: the boxes of tiles, and the adhesive and grout in bags, for a room's walls.
- Floor tile calculator: the same for a floor.
- How we compare products: what “worked out” and “Ad” mean on these pages.