ARDEX S 21
Tile adhesive · ARDEX
ARDEX S 21 comes in 22 kg bag. The catalogue holds no coverage figure of the maker's for it yet.
- Bag sizes
- 22 kg1 size in the catalogue
- For
- 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 S 21
- 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.
What it is for
In the maker's own words.
“ARDEX S 21 is a special rapid hardening pourable bedding mortar for floor tiles in internal and external locations”
Bag sizes
- 22 kg bag
Questions about ARDEX S 21
What is ARDEX S 21 for?
ARDEX UK says: “ARDEX S 21 is a special rapid hardening pourable bedding mortar for floor tiles in internal and external locations” (ARDEX S 21 product data sheet, read 12 October 2026).
What sizes does ARDEX S 21 come in?
The catalogue lists 22 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
- not stated here
- Sizes
- 17 kg bag
BAL
- Coverage
- not stated here
- Sizes
- 20 kg bag
Bostik
- Coverage
- not stated here
- Sizes
- 20 kg bag
Bostik
- Coverage
- not stated here
- Sizes
- 20 kg bag
More from ARDEX
6 of the 17 other ARDEX products in the catalogue, by name. All ARDEX products.
- Coverage
- not stated here
- Sizes
- 20 kg bag
- Coverage
- not stated here
- Sizes
- 20 kg bag
- Coverage
- not stated here
- Sizes
- 20 kg bag
- Coverage
- not stated here
- Sizes
- 20 kg bag
- Coverage
- not stated here
- Sizes
- 20 kg bag
- Coverage
- not stated here
- Sizes
- 20 kg bag
Where the figures come from
- What it is for: ARDEX UK, ARDEX S 21 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.