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Watco Concrex Flex

For repairing floors subject to vibration, movement or impact. Virtually indestructible

  • Virtually indestructible epoxy resin repairs
  • Exceptional impact and wear resistance
  • Chemical resistant and anti slip
  • Can be feather edged
  • Resistant to vibration
Frequently bought together


Watco Concrex® Flex has been specially developed with a new blend of resins, to enable expansion joints, ramps, guide rail surrounds and any other areas commonly subject to vibration and movement to be repaired. Areas like these may have been badly affected by cracking and spalling in the past, but Watco Concrex® Flex will provide a permanent repair where a rigid mortar might fail. Watco Concrex Flex also has excellent chemical resistance and cures quickly allowing the floor to be put back into use.

Recommended areas of use

  • For floors subject to vibration, movement or impact


  • Virtually indestructible epoxy resin floor repairs
  • Exceptional impact and wear resistance
  • Resistant to vibration
  • May be feather edged
  • Fast curing
  • Chemical resistant and anti slip
  • Use internally or externally - it will not be damaged by frost
  • Impermeable and non-dusting
  • Can be painted if required
  • Suitable for heavy traffic


Suitable for Concrete, sand & cement and metal
Appearance Mid Grey
Finish Smooth
Interior or Exterior Exterior, Interior
Primer required Primer isn't usually required if patch or crack repairing. Tack Coat adhesive primer is recommended when applying as a thin section screed or when applying to smooth, non-porous or metal surfaces. Tack Coat also enables repairs to be made to damp surfaces
Composition A finely graded sand pre-blended with epoxy resin
Coverage 1.2m² at 5mm thick per 10kg
Application tools Steel float or trowel
Application Trowel the mortar firmly into the repair
Curing time (at 20°C) 6 hours
Minimum application temperature 10°C
Pot life 30 minutes to one hour, depending on the temperature. If Concrex Flex® is used past its working life, trowelling will become difficult and adhesion will be reduce
Storage Between 10°C - 30°C. Do not allow to freeze
Shelf life 12 months in unopened container
Depth (mm) 50mm
Principle limitations Do not apply to wet surfaces. Watco Tack Coat should be used for application to damp surfaces before applying Concrex Flex
Cleaning tools Equipment used for mixing and applying should be wiped clean with white spirit or a similar solvent before the Concrex Flex cures


Surface preparation

Surfaces should be clean, dry and free of all loose material. Wire brushing or sweeping is generally sufficient. Watco Bio-D degreaser can be used to remove grease and oil. If the surface is damp it can be primed with Watco Tack Coat.


Each Watco Concrex Flex® pack contains a granular resinous compound and separate containers of curing agent. The components are mixed by trowel according to the simple Instructions in the pack until a smooth grey mortar is obtained. The more thorough the mixing, the ‘wetter’, smoother and more manageable the mix becomes. This can be achieved quite quickly by wearing disposable gloves and kneading the mixture by hand. A 'Creteangle' or similar mixer can be used to ensure thorough mixing of larger quantities.


Watco Concrex Flex® is trowelled firmly against the surface to be repaired, and finished with a trowel or float. To prevent drag on the trowel, a rag moistened with white spirit may be wiped across the face of the tool.

Test results

Test results

Concrex Flex is far stronger than concrete. The table shows a comparison (typical figures)

Tensile StrengthCompressive Strength
Watco Concrex®Flex3.5 MN/m258.9 MN/m2


3.4 MN/m221.41 MN/m2
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€133.70 (Ex VAT)

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Watco Concrex Flex