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Watco Concrex Flex

Impact and crack resistant floor repair

  • Virtually indestructible epoxy resin repairs
  • Inbuilt flexibility resists vibration and movement
  • Chemical resistant and anti slip
  • Can be feather edged

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.


  • Flexible and tough
  • Resistant to vibration
  • May be feather edged
  • Fast curing
  • Chemical resistant and anti-slip
  • Impermeable and non-dusting
  • Can be painted if required
  • It has all the strength and abrasion resistance associated with Concrex® original but offers sufficient flexibility to resist cracking due to movement of the substrate
Suitable for Concrete, metal, brick, masonry
Interior or Exterior Interior and exterior
Primer required A primer is not usually required if patch or crack repairing. Watco Tack Coat adhesive primer is recommended when applying Watco Concrex® Flex as a thin section screed or when applying to smooth, non-porous or metal surfaces. Watco Tack Coat also enables repairs to be made to damp surfaces.
Composition 2 part epoxy resin
Coverage 1.2m² at 5mm thick per 10kg
Curing time 5-6 hours at 20°C
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.

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.

£99.00 (Ex VAT)

In stock

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Tools and accessories

Trowels and Floats

Trowels and Floats

Ideal for mixing, applying and levelling repairs

From £3.40  (Ex VAT)

Watco Concrex Application Kit

Watco Concrex Application Kit

Everything you need for applying Concrex

From £15.20  (Ex VAT)

Watco Tack Coat

Watco Tack Coat

High strength 100% solids epoxy resin adhesive primer

From £23.60  (Ex VAT)

Wire Brush & Scraper

Wire Brush & Scraper

A useful tool for removing rust and old coatings

£2.60  (Ex VAT)

Watco Low Odour White Spirit

Watco Low Odour White Spirit

Ideal for cleaning tools after application

£5.00  (Ex VAT)

What our customers say

Help & Advice

Contact our friendly and professional Technical Advisors for expert help and advice for your project. You can give us a call on 01483 418 418 or email

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