ARDEX X 78 S

MICROTEC® Ultra Rapid Setting Flexible Semi-Pourable Floor Tile Adhesive

ARDEX X 78 S has a unique pourable consistency that is ideal for solid bed fixing large format floor tiles, without the need to butter the back of the tile. Furthermore, tiles can be walked on and grouted after only 90 minutes.

  • Semi-pourable consistency ideal for solid bed fixing large format floor tiles
  • Ultra rapid setting and hardening – walk on and grout after only 90 minutes
  • Ideal for all tile types including porcelain, fully vitrified, mosaics and terrazzo
  • Excellent application properties and high yield
  • Ideal for swimming pools and wet areas
  • For internal and external applications
  • Suitable for underfloor heating

Unit Size Available: 20kg

Coverage: Approximately 5.5m2 at 3mm thick per 20kg unit

Watch the 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