Beyem Flex

Deformable, high performance cement based tile adhesive (C2TES1), for fixing large formats and tiling on facades.

BEYEM FLEX is a high performance cement based tile adhesive (C2TES1), formulated with cement, selected aggregates, special additives and synthetic resins  to improve workability, water retentivity, open time and adhesion. Deformable. No vertical slip. Allows adjustment of tiles. Especially suitable for fixing porcelain tiles, large formats and facade tiling.

Indoor environment quality. Classifed as  A+ class according to Décret nº. 2011-321 (France).

  • High  resistance to water and thermal shocks.
  • High deformability.
  • High water retentivity.
  • High mechanical  strength.
  • Extended  open time. Allows adjustement of tiles.
  • Easy workable. Highly thixotropic.
  • High tensile bond strengths. More durability.
  • No vertical slip.
  • Especially suitable for fixing large formats, industrial and comercial applications (heavy traffic…) and  underfloor heating or undertile warming.
  • Very low VOCs emissions

Laying of ceramic tiles of low/medium/high absorption in interior and exterior situations to walls and floors. Especially suitable for laying low absorption ceramic tiles (porcelain, marble, natural stone)  in  exterior floors and walls. Ideal  for  underfloor heating or under tile warming.

BEYEM FLEX is suitable for:

  • Cement  based substrates.
  • Cement based renders /plasters and screeds.  Cement based waterproofing  membranes.
  • Concrete floors.
  • Plasterboards.
  • Compact natural stone, underfloor heating and existing ceramic substrates.

Substrates must be clean, compact and  free of substances that reduce adhesion such as dust, oil, grease and with no loose material. Uneven areas must be corrected with suitable smoothing and finishing products. Substrates must be free from any rising damp and have already completed the curing period of hygrometric shrinkage. Dampen substrates with water  to cool down if they should be too warm, in case of wind or over absorbent substrates  and wait until the thin layer of water disappears. Do not  use on  gypsum  based plasters or paint.

Mix manually of mechanically BEYEM FLEX with 7,25-8,25 l per bag of clean water until a homogeneous, creamy and lump-free paste  is obtained. Let the mix stand for 5 minutes before application.

Small tiles must be fixed using  a notched trowel of 6×6 mm. For tiles sizes greater than 400 cm2,  a notched trowel  8×8 mm  must be used.  Spread the mixed product onto the substrate to a maximum surface area of 1 m2 or no more than can be tiled within 30 minutes in normal conditions. Unfavorable environmental conditions (strong sunlight, drying wind, high temperature as well as a highly absorbent substrate), could drastically reduce this time to a few minutes. Bed the tiles firmly into the adhesive with a slight sliding and/or twisting action, to ensure a good contact and complete coverage.

It is good practice to lift an occasional tile after fixing, to verify that the required contact is being achieved. Back of the tile must be completely wet.

  • On gypsum substrates, apply BEYEM FIJADOR primer before , to avoid contact between gypsum and the cement of the adhesive, avoiding adverse reactions.
  • Do not apply on plastic, metal or wood.
  • Do not apply below 5ºC or above 30ºC.
  • Do not apply when there is  risk of frost, rain, strong wind or direct sunlight.
  • Leave joints between tiles with a minimum width of 2 mm. Grout with  BEYEM JUNTA UNIVERSAL / BEYEM JUNTA EXTRAFINA.
  • On floors  with a surface area greater than 30 m2 , it is recommended to leave separation or sealing joints filled with a deformable material.
  • On interior floorings larger than 15 m2, it is advisable to keep a free perimeter expansion joint between the floor and the wall or pillar, hidden by a skirting board (of approximately 5 mm).
  • On façades and external cladding, the material should always be fixed with anchors or mechanical fixings, when some of the following conditions apply: format above 900 cm2, one side of the largest piece is larger than 60 cm, weight above 40 kg/m2 or height of tiling up  than 3 metres.
  • Existing ceramic tile/natural stone: requires preliminary treatment.
  • Underfloor heating/warming: the heating must be off, and should be turned on gradually at least 7 days after tiling and grouting.
  • The temperature, ventilation, and absorption of the substrate and covering materials, may vary the adhesive workability and setting times.

Product identity. Properties of mixture and application data





Bulk density

≈ 1220 Kg/m3

Density of the mix

≈ 1650 Kg/m3


0-600 µm

Mixing water,%

± 31%

Pot life

≈ 2 h

Adjustability time

≥ 30 min


≈ 24 h


≈ 3,5 Kg/m2  (single spread technique)

≈ 5,0 Kg/m2  (double spread technique)

Tariff code


Final performances




Initial tensile adhesion strength

≥ 1,0 N/mm2

Tensile adhesion strength after water immersion

≥ 1,0 N/mm2

Tensile adhesion strength after heat ageing

≥ 1,0 N/mm2

Tensile adhesion strength after freeze/thaw cycles

≥ 1,0 N/mm2

Open time

30 min


≤ 0,5 mm

Transverse deformation

≥ 2,5 mm

Total VOCs (28 days)

< 500 µg/m3

BEYEM FLEX is packed 25 kg plastic lined paper bags.

Storage:  when stored unopened in a cool dry place, shelf life is 12 months from date of manufacture.

Tools can be cleaned easily with water  before the product hardens. Hardened product can be remove only mechanically.

Laying of ceramic tiles, marble or natural stone, must be carried out with cement based adhesive compliant with EN 12004-1 – class C2TES1, such as Beyem Flex manufactured by Rodacal Beyem company. The substrate must be compact, free from any flaky, loose parts and must be clean and cured, having already completed the shrinkage stage. Existing joints must be respected and elastic fractionizing and perimeter joints must be created. Ceramic tiles must be laid with joint-gap spacers with a width of ___ mm.

For further and complete information about the safe use of our product please refer to our latest version of the Safety Data Sheet, which is available upon request.

Disposal of the product and packaging must be in accordance with current legislation. This is  responsibility of the final product user.


Technical sheet

Component Safety Data Sheet

Certificado Sistema Gestión de Calidad ISO 9001

Certificado Sistema Gestión de la I+D+i UNE 166002

Declaration of benefits

Factory Production Control Certificate

Declaración Compuestos Orgánicos Volátiles


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