Weber Saint-Gobain - Official website of the company

webertai no stain

webertai no stain
webertai no stain

Product Benefits

  • Anti-efflorescent and white stain
  • Good for laying large size tiles, granito tiles, granites, and marbles
  • Resist to all weather conditions
  • Laying tiles on internal existing tiles
  • Ideal for laying tiles in the areas with highhumidity
  • Low VOCs

Anti-stain high performance tile adhesive for external areas and for the areas with high humidity.

Product Features

Key benefit

  • Floor & Wall
  • Interior & Exterior
  • House & Building/Office/Shop/Lobby
  • Ideal for very humid area where white-stain can be occurred on tile such as fountain, label of hotel, column or ladder    

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

Certified Standard

International/European standard

  • Initial tensile adhesion strength ISO 13007 part 2- or EN 1348-8.2
    • Standard ≥ 1.0 N/mm2 l Result 1.26 N/mm2
  • Tensile adhesion strength after water immersion ISO 13007 part 2- or EN 1348-8.3
    • Standard ≥ 1.0 N/mm2 l Result 1.11 N/mm2




Send or download the documentation

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


Surface 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.).  

Tile 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.  
  • Gradually add weber.tai no stain (20 kg), by the weight ratio of 1 part of water per 4 parts of dry mortar (or 1:3.5 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 use in order to have the complete chemical reaction. 
    • The mixture of weber.tai no stain, should be used within 4 hours and kept away from heat and 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 order to be sure with efflorescence prevention property, it must have adhesive buttered onto the tile back.
  • 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 maxx sets.
  • Wait for 24 hours before grouting to let the adhesive dry completely.
    • Weber grouting products are available in many ranges of color and application depending on the joint width and working conditions.  



Application property

  • Pot life: 4 hours 
  • Open time: 20-30 minutes 
  • Adjustment time: 15 minutes
  • Time before grouting: at least 24 hours 
  • Time before traffic: 24 hours 
  • Recommended thickness: 2 to 10 mm.  


  • It's highly recommended to use with efflorescense prevention tile grout weber.color no stain
  • To maintain straight joints, spacers should be used (as shown in the picture).  The joint width is controlled by the width of spacer. 
  • Avoid tiling when raining or cover the tiling areas in order to prevent stain that can be occured when tile adhesive is not set.
  • In case of large-size tiles, avoid tiling traditionally (using traditional mortar for leveling and tiling at the same time).  It is important to do leveling before tiling because it can prevent tile from de-bonding after opened for traffic and prevent the shrinkage of cement. 
  • Avoid using the adhesive on red-hot substrates or the substrates exposing to direct sunlight.  


  • Powder density: 1.4 g/cm3
  • Chemical curing time : 3-4 minute
    • Note: These test results are from laboratory test.  They could be slightly different from on-site results because of the differences in applications and conditions.



  • 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)



  • Grey