Weber Saint-Gobain - Official website of the company

webertai flex

webertai flex
webertai flex

Product Benefits

  • Flexible: suitable for laying tile on deformable substrates.
  • Laying tiles on both internal and external existing tiles.
  • Good for laying large size tiles, granito tiles, granites, and marbles.
  • Resist to all weather conditions, pressure,and vibration Ideal for laying tiles in high-rise buildings.
  • Low VOCs.

Flexible high performance tile adhesive for fixing all sizes and types of tiles in heavy-duty areas.

Product Features

Key Benefits

  • Resist to compressive strength and vibration from heavy traffic and structural movements
  • Resist to temperature variation on the substrates i.e. exterior walls of hi-rising buildings
  • Excellent bonding strength 
  • Tiles can be adjusted for long period due to longer open time 
  • Longer pot life allows the mixture standing longer for use (keep away from heat and sunlight)
  • Tiles are adjustable within 15 minutes
  • Tiled floor can open for foot traffic after 24 hours

Technical Data

  • Density of powder : 1.4 g/cm3
  • Chemical curing time : 3 - 4 minutes
  • Pot life (in shade) : 4 hours
  • Open time : 20-30 minutes
  • Adjusting time : 15 minutes
  • Recommended thickness : 2 - 10 mm
  • Waiting time before grouting : 24 hours
    • Remark: These test results are from laboratory test. They could be slightly different from on-site results because of the differences in applications and conditions.

Limit of Use

  • Not suitable to use directly on glazing substrate, wooden or parquet or painted surface, and cement-fiber board (instead use weber.prim 2 primer before applying weber.tai flex).
  • Not suitable to use on metal surface (instead use weber.color poxy).

Certified Standard

International/European standard

  • Initial tensile adhesion strength ISO 13007 part 2- or EN 1348-8.2
    • Standard ≥1.0 N/mm2 l Result1.98 N/mm2
  • Tensile adhesion strength after water immersionISO 13007 part 2- or EN 1348-8.3
    • Standard ≥ 1.0 N/mm2 l Result1.42 N/mm2
  • Open time tensile adhesion strength ISO 13007 part 2-4.1 or EN 1346
    • Standard ≥ 0.5 N/mm2 l Result 2.18 N/mm2
  • Deformability ISO 13007 part 2 - 4.5 or EN 12002
    • Standard S2-deformable ≥ 5 mm. Result 5.5 mm.




Portable Document Format (PDF)

Security datasheet

Certificate datasheet

Send or download the documentation

You can either send the documentation to en-email address, or download it.


Surfaces Preparation

  • For new substrate: it should be flat, hard, level, dry, and clean with normal absorption.                
  • For old substrate: scrape off any peel-off coatings or remove any de-bonding tiles and do the re-tiling. 
  • Clean the surface until free from grease, dust, or any stains. 
  • If the surface is very porous with high absorption, it should be wet until reaching its saturated point before tiling. 
  • In case of new screed or render, the substrate should be fully cured for 7 days per 1 cm thickness of concrete before tiling. 
  • For old substrates or existing tiles, it is recommended to clean with hydrochloric acid (cleaning chemical for bathroom) in order to make sure the adhesion on old tile substrate. 
  • In case of flexible or bendable substrates; gypsum board, gypsum-fiber board for instance; it is recommended to frame and brace them with screw for every area of 900 cm2 (30 x 30 cm.).  



Tiles Preparation

  • Tiles should not be immersed in water because it will decrease bonding strength of the adhesive.
  • Ensure that tiles are clean, dry, free from grease, dust, or any other contaminations.


  • Put 5 liters of clean water in a bucket (the water should be at room temperature, not warm or hot).
  • Gradually add weber.tai flex (20 kg),
    • by the weight ratio of 1 part water per 4 parts of adhesive
    • (or 1:3 by volume), in water and mix at the same time by using slow speed (500 rpm) electric mixer. 
  • When using traditional trowel, mix properly until homogeneous lump-free paste is obtained.
  • After proper mix, leave the product for 3 - 4 minutes before using in order to have the complete chemical reaction.
  • The mixture of weber.tai flex should be used within 4 hours and kept away from heat & sunlight.  




  • Apply some adhesive on the substrate, and then use a notched trowel to equally spread the adhesive on the area of 1 - 2 m2.  The depth of the notched trowel is to control the constancy and quantity of adhesive.
    • For floor: spread the adhesive on the substrate with the notched trowel.     
    • For wall: better spread the adhesive horizontally with the notched trowel (as shown in the picture) on the substrate.    
    • Using notched trowel will ensure a better transfer of adhesive onto both tiles back and substrates than using brick-laying trowel.
  • In case of tile size exceeding 25 x 25 cm (10" x 10"), it is recommended to have adhesive buttered onto the tile back in order to ensure the overall covering of the adhesive onto substrate and also to prevent voids underneath the tiles, which could make tiles being fragile and allow water permeation.
  • Lay tiles on the adhesive and press firmly or knock gradually with rubber hammer in order to spread the notch of adhesive equally and ensure a good contact.  
    • Leave clearance joints, at least 2 mm, for grouting.
  • Carefully clean off any excess adhesive from the tiles and joints with a damp sponge while the adhesive is still wet.
  • Any adjustments can be done within 15 minutes before weber.tai flex sets.
  • Wait for 24 hours before grouting to let the adhesive dry completely.

Application Property

  • Pot life: 4 hours
  • Open time: 30 minutes
  • Adjustment time: 15 minutes
  • Time before grouting : minimum 24 hours
  • Time before traffic: 24 to 48 hours
  • Recommended thickness: 2 to 10 mm

Recommendation for Use

  • Avoid applying the adhesive in lumps (as shown in the picture 1) at the tile back.  This will create voids underneath the tiles, which could lead to the tile fragility and water permeation.
  • Avoid using the adhesive on red-hot substrates or the substrates exposing to direct sunlight.  
  • To maintain straight joints, spacers should be used (as shown in the picture 2).  The joint width is controlled by the width of spacer.
  • To avoid water leakage into underneath tiles and to avoid tile movement when there is foot traffic, the joint width is recommended to be at least 1.5 mm for wall and at least 3 to 20 mm for floor.



  • 20 kg bag (Approximately one bag/ 4 m2)  

Shelf Life & Storage

  • One year after manufacturing date when stored unopened in dry and ventilated place. (Store airtight in dry and ventilated conditions, if remained in opened bag)



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