ARDEX S 20

Flexible Rapid Drying Natural Stone Wall & Floor Tile Adhesive

ARDEX S 20 virtually eliminates the risk of water staining and is ideal for uncalibrated stone. For bed thicknesses from 5mm to 20mm.

  • Ideal for natural stone tiles - eliminates the risk of water staining
  • Can be walked on and grouted 3 hours after fixing
  • ARDEX S 20 W white is ideal for fixing light and translucent marble and other types of translucent natural stones
  • For internal, dry or intermittently damp locations
  • Suitable for use on heated subfloors
  • For use on walls and floors

Unit Size Available: 22kg

Coverage: Approximately 4.1m2 at 3mm thick per 22kg unit

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Tile adhesive
Notch size / bed thickness
Area to be covered

How much will I need?

The number of kg required = kg
The number of units required for your project = units.

The calculation above indicates the approximate number of units required, and does not allow for site conditions or wastage

Select product
Depth mm
Area to be covered
Select product
Depth mm
Area to be covered
Select product
Depth mm
Area to be covered

The calculator below will tell you how large an area a unit of the selected grout will cover, based on the dimensions that you supply. Simply enter the required figures in the boxes below and view the results in the results box.

Tile Dimensions Grout
Length (mm)
Breadth (mm)
(check joint width)
Joint Dimensions
Width (mm)
Depth (mm)

All tile and joint dimensions are rounded up to the nearest number (no decimal points).


Results - based on figures and product chosen above.
Result kg per square metre. Therefore:
a kg unit will cover -

How many unit(s) will I need?

Enter the area of your project here: m²   
The number of kg unit(s) required for your project =

The calculation above indicates the approximate number of units required, and does not allow for site conditions or wastage