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Product Information

Suitable for beds of 3-12mm, interior and exterior grade, for wall and floor installations. Ideal for large format natural stone tiles.

CE Approved: Conforms to EN12004 Class C2FT.


This product has been developed for fixing ceramic, porcelain, large format, natural stone, marble, travertine and mosaic tiles to a variety of substrates including heated screeds and over boarded timber. PTA is water-resistant making it suitable for use in bathrooms, saunas and swimming pools. Note: We offer this product in 2 colours, white and grey; for porcelain or light coloured tiles, that may be subject to staining, you must use the white-based powder to avoid trowel marks grinning through.

All substrates must be suitably dry and comply with the recommendations in the British Standards and TTA
Guidance documents. All substrates should be clean and thoroughly sound; they should be free from standing water, oils, grease, dust, loose particles or any other contaminants that may hinder adhesion.
Gypsum Based Screeds: These generally require mechanical preparation by buffing and vacuuming, etc. The screed must be tested to ensure it is dry (less than 0.5% moisture content measured by CM). All gypsum based screeds should be primed as follows: first coat Bond It PRIMER AND FLEXIBLE ADMIXTURE diluted 1:1 with water and allowed to dry; second coat PRIMER AND FLEXIBLE ADMIXTURE applied neat and allowed to dry
Gypsum Plaster: Gypsum plaster on walls is suitable for a weight of tiles and adhesive of up to 20kg/m2. Plaster
should not be dusty or overly polished and should be primed with Bond It PRIMER AND FLEXIBLE ADMIXTURE.
Concrete: Ensure that these are dry and cured through. Freshly laid concrete can take up to 3 months to fully cure. Do not apply tiles until it is fully cured.
Painted Surfaces: Any loose or water sensitive paint should be removed. Any subsequent bonds to a painted
surface are only as strong as the paint film. Rough and Uneven Surfaces: These should be levelled with a suitable levelling compound and allowed to dry before tiling.
Underfloor Heating: New heating systems must have been trialled at a high temperature for a period of at least
48 hours in advance of tiling. Ensure the heating is turned off at least 48 hours before any tiling work is carried out
and not turned on until at least 7 days after the work has been completed. Heating should be turned on at the
lowest setting and the temperature increased by no more than 5C per 24 hours. Particular attention should be
given to ensure there is adequate provision for movement joints in tiling.
Timber Substrates: Timber substrates must be sufficiently rigid and supported to be free from excessive
deflection under expected loads. Ensure adequate ventilation exists beneath the floor. Ensure all new wood (including joists) is ‘dry’ and conditioned. The floor should be designed to accommodate both seasonal changes in
moisture and the changes caused by step changes in heating. Extra joists/ noggins should be added to strengthen the floor as required. In wet areas, timber substrates must be suitably tanked. Plywood on walls is suitable for a weight of tiles and adhesive up to 32kg/m2.
On floors, existing floorboards should be overboarded. Plywood used for overboard must be at least 15mm thick exterior grade. Boards should be free from any wax or other coatings which may impair the bond. Ensure surface is free from contamination and that the backs and edges of all boards are sealed against moisture ingress. Boards should be laid broken-bonded with the long edges running at right angles to the joints between the existing boards and screwed to joists and existing boards at 300mm centres.
Movement Joints: It is important to ensure that there is adequate provision of movement joints in all wall and floor
tiling. It is recommended to follow the guidance provided in BS 5385, by the TTA and by proprietary joint manufacturers. Ideally, movement joints should be detailed by the designer at the outset.

The adhesive should be added to clean water (approx. 5L water/ 20Kg) adhesive and mixed with a suitable forced
action mixer or slow speed drill and paddle until a slump free mortar is produced. The mixed adhesive is usable for
up to 45 minutes depending on-site temperature and conditions. Do not attempt to remix adhesive or add extra
water after it has begun to stiffen as this will cause a loss of performance.

How To Use:

  • Cement-based products will take longer to harden and set at lower temperatures and should not be used below 5C.
  • The mixed adhesive should be applied to dry areas on walls using a suitable notched trowel and applied by the solid bed on wet areas on walls, on all exterior tiling and on all floor tiling.
  • In addition, when fitting large format tiles it is highly recommended to also fully skim the back of the tile with a thin layer of adhesive.
  • Tiles should be placed with a firm twisting action before the adhesive has skinned over i.e. within the open time.
  • Regularly check to ensure adequate contact between adhesive, tile and substrate.
  • ‘Dot and Dab’ is not a suitable method of application.
  • The final set will occur after approximately 3 hours depending on temperature.
  • Clean off the surplus adhesive with a damp cloth before it sets.
  • It is important that the tiles are left undisturbed for a minimum of 2 hours after fixing at normal temperatures.
  • Do not use at temperatures below 5C or in conditions of extreme heat.

Grouting may proceed only when the adhesive has cured. Depending upon conditions this is normally after
approximately 3 hours. Cold or humid conditions will slow drying times.

This will vary according to application technique, substrate and type of tile used. However, a 20Kg bag will cover
approximately 5m2 with a 3mm bed thickness.

Additional information

Weight 1 kg


Manufacturer Part Number




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