Ardex Flex FS Flexible Tile Grout with Built-in Admix

£24.93£31.92 exl. VAT

Per Unit


Flexible Wall and Floor Tile Grout With Built In Admixture.

  • Suitable for internal and external use
  • Water repellent
  • Dirt resistant
  • Suitable for wall tiling, and narrow joints in floors
  • No colour variation or streaking during mixing
  • Can accept foot traffic after 5 hours @ 20C



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Ardex Flex FS – Flexible Coloured Tile Grout

Ardex Flex FS – Flexible Coloured Tile Grout is a cement-based grouting compound with excellent flexible and water-repellent properties, without the need to add a separate admix. Coverage will depend upon the tile size, joint width and depth and the grout coverage figure, which for Flex FS is 1.5.

  • Available in 35 colours*
  • No colour variation or streaking during mixing
  • Water-repellent and dirt resistant
  • Easy to apply and clean off the tile surface
  • Ideal for commercial and domestic environments such as swimming pools, showers and kitchens
  • For tile joints up to 4mm wide
  • Suitable for wall tiling, and narrow joints in floors
  • For internal and external applications, including heated subfloors

Ardex Flex FS Uses

The BS EN 13888 classification for Flex FS is CG2 WA, an “improved cementitious grout with additional characteristics of reduced water absorption and high abrasion resistance”. Ardex Flex FS is suitable for grouting joints up to 4mm wide, between porcelain, ceramic, non-moisture sensitive natural stone and quarry tiles, as well as extruded tiles and glass blockwork. The hardened grout is weather resistant, unaffected by water, and can be used for internal and external tiling in dry and wet locations, including swimming pools with non-aggressive water conditions.  Flex FS can be applied to both wall and floor tile joints and can receive foot traffic after 5 hours at 20oC.

Where chemical spillages or corrosive liquids are likely to be in contact with the tile joints, use either Ardex WA Epoxide Adhesive and Grout or Ardex EG 8 Plus Epoxide Adhesive and Grout.


Not quite what you’re looking for?  Browse more of our Ardex range.

Want to see how Ardex Flex FS and other Ardex products have been used?  View a range of Ardex Projects.

Additional information


10 Kg Bag, 4 x 2.5Kg Bags


Antique Ivory, Autumn Red, Barley Sugar, Blossom White, Brilliant White, Burnt Orange, Cast Iron, Classic Vanilla, Coffee Bean, Dove Grey, Floating Driftwood, Fresh Magnolia, Fresh Snowdrop, Gentle Blush, Gentle Dawn, Grey Dusk, Ground Cocoa, Innocent Black, Natural Almond, Ocean Grey, Organic Earth, Oyster Pink, Pebble Drift, Silver Shimmer, Slate Grey, Spring Green, Spring Jasmine, Stone Beach, Stormy Mist, Summer Yellow, Wild Mushroom, Winter White

Suitable for Substrates

Flexible Tile Grout

Minimum Thickness: 1mm

Maximum Thickness: 4 mm

Compressive Strength @ 28 days: N/A

Walkable: 5 Hours

Finished Floor Covering After: N/A

Suitable for Substrates: N/a



For more than 60 years, ARDEX has been a quality leader for the flooring and tiling industries, the brand of choice for installers and distributors. ARDEX today is still an independent family-owned business. This means that in our permanent efforts to achieve market-shaping innovations, we have been able to retain our most important tradition: uncompromising quality. This is something we guarantee by applying the latest rigidly enforced quality assurance procedures, making it no coincidence that they are regarded as a premium partner of the construction industry. Strong internal growth and intelligent acquisitions in foreign markets have put the Group on the map with 53 subsidiaries and 3,000 employees on all continents. With its 14 major brands, the ARDEX Group generated a worldwide annual turnover in excess of 770 million euros in 2018. This marks an important milestone and they are becoming one of the world’s leading suppliers of high-quality specialist building materials.

Technical Information