ARDEX S 28

MICROTEC® Rapid Drying Semi-Pourable Natural Stone Floor Tile Adhesive

ARDEX S 28 and ARDEX S 28 W are rapid hardening and rapid drying tile adhesives with specific properties for fixing moisture sensitive natural stone floor tiles.

  • MICROTEC fibre reinforcement for high performance
  • RAPIDRY Formula reduces the risk of water staining, curling and warping in moisture sensitive natural stones
  • Semi-pourable consistency ideal for solid bed fixing large format floor tiles and slabs
  • Can be trafficked and grouted 2 hours after fixing, regardless of bed thickness
  • Achieves an open time of up to 30 minutes
  • Up to 60 minute pot life
  • ARDEX S 28 W is ideal for fixing light and translucent marble and other types of natural stones

Unit Size Available: 20kg

Coverage: Approximately 6m2 at 3mm thick per 20kg unit

Watch the Natural Stone Tiling Application Video

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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