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Watco Concrex Epoxy Repair Mortar

Permanent granite hard repairs where ordinary mortars fail

  • Virtually indestructible
  • Impervious and non-dusting
  • Mix and apply in minutes
  • So strong it can be feather edged

Concrex® cures to a granite-hard finish that is impervious and non-dusting.


  • Easy to apply: Concrex takes heavy traffic after 12-16 hours at 20°C
  • Virtually indestructible: 8 times stronger than concrete. Full strength achieved at 5mm thickness
  • Minimal prep time: Saves labour costs; mix and apply in minutes
  • Watco Tack Coat is recommended for all applications and is essential for shallow applications and screeding
Properties Incredibly tough, granite–hard finish, chemical–resistant, anti–slip, priming not normally required, impervious and non-dusting, may be feather-edged, cures in 3–6 hours at ambient temperatures, ready for heavy traffic in 8–12 hours.
Appearance Smooth, impervious surface.
Surfaces Floors, ramps, steps.
Interior or Exterior Interior and exterior.
Primer required Tack Coat Primer is essential for shallow applications and screeding.
Coverage 1.2m² per 10kg at 5mm thick.
Pot time (hours) 30 minutes.
Curing time 3-6 hours.

Surface preparation

Surfaces to be treated must be clean, dry and free of friable material, a wire brush or sweep is usually sufficient. Watco Bio-D degreaser can be used if there are spots of oil or grease.


Each bucket contains Concrex powder and bottles of hardener. Mix the two components with a trowel until you achieve a uniform grey colour, you can complete the Mixing by using your gloved hands. For large quantities, it is advisable to use a mixer.


Apply the repair mortar to the surface to be repaired and smooth with a trowel. To prevent streaks, wipe the blade with a rag soaked in White Spirit.


Case studies

€93.30 (Ex VAT)

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Specialist alternatives

Applying in cold conditions?

Complete your maintenance projects all year round

Our chemists have developed cold curing products with the latest resin technology so you can continue with your repair projects all year round.

All cold cure

Watco Concrex Sub Zero

For essential repairs during the winter months

€110.60 (Ex VAT)

Need chemical resistance?

Ensure your floor surface is resistant to chemical attack

if you are repairing an area where chemicals are stored or regularly used, you will need to ensure the repair material can stand up to chemical attack.

All chemical resistance

Watco Concrex Acid Strength

Permanent floor repairs with excellent chemical resistance

€110.60 (Ex VAT)

Need to fill a deep hole?

Get the right product for filling holes deeper than 50mm

Our Deep Fill alternatives allow you to apply them at much thicker depths in one application. Meaning you can get a more economical formula that delivers the same strength and reduces downtime.

All hole repair

Watco Concrex Deep Fill

Economical and strong repair formula for deep holes

€120.20 (Ex VAT)

Need a flexible repair?

Give flexibility to areas prone to movement

Flexible formulations are ideal for areas where vibration, movement or impact may occur. The material moves with the substrate to avoid it breaking up or cracking.

All flexible

Watco Concrex Flex

Impact and crack resistant floor repair

€119.30 (Ex VAT)

Repairing asphalt?

Choose the right product for your surface type

If you are repairing an asphalt substrate, then we have a range of bitumen based products that help blend in with the existing environment.

All asphalt repair

Watco Concrex Asphalt Repair

Ultra-strong repairs to damaged concrete and asphalt

€114.00 (Ex VAT)

Tools and accessories

Trowels and Floats

Ideal for mixing, applying and levelling repairs

From €3.50  (Ex VAT)

Watco Concrex Application Kit

Everything you need for applying Concrex

From €15.90  (Ex VAT)

Watco Tack Coat

High strength 100% solids epoxy resin adhesive primer

From €24.70  (Ex VAT)

Wire Brush & Scraper

A useful tool for removing rust and old coatings

€2.80  (Ex VAT)

Concrex Mixing Tub

A large mixing tub ideal for mixing Watco Concrex

€11.20  (Ex VAT)

Help & Advice

Contact our friendly and professional Technical Advisors for expert help and advice for your project. You can give us a call on 01 6725 180 or email

Contact us