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Watco Flexible Joint Repair

For repairing broken expansion joints quickly and easily. A polyaspartic mortar.

  • Fills and repairs joints and broken joint edges in one step
  • Halves the time taken by conventional joint systems
  • Ready for use in 8-12 hours
  • Flexible polyaspartic mortar
Delivery options
Next day delivery slots available upon request. Call us on 01483 418418 for details.
Frequently bought together


This tough, flexible filler means what is usually a two stage job is now just one simple process.

Most traditional flexible filler applications require two steps - reforming joint edges with mortar, and then filling the joint with expansion materials. Watco Flexible Joint Repair eliminates the need to reform joint edges, making the process one simple step rather than two.

Recommended areas of use

  • Floor expansion joints


  • Repair broken expansion joints quickly and easily - ready for use in only 8-12 hours
  • The flexible polyaspartic mortar fills the joint and the broken concrete joint edges in one simple process
  • Strong enough to resist heavy traffic, including forklifts
  • 2.5L pack

  • Coverage
    Width (mm)10203050 100
    Depth (mm)10 101525 25


Properties Flexible to cope with movement, hard surface for areas of heavy traffic and high use
Suitable for Concrete
Finish Grey - satin
Interior or Exterior Exterior, Interior
Composition 2 part polyaspartic and aggregate blend
Coverage Approximately 12.5 x 20mm wide x 10mm deep joint per 2.5L
Application tools Trowel and masking tape
Application Trowel into the joint
Curing time (at 20°C) 8 hours
Minimum application temperature 0°C
Maximum application temperature 30°C
Pot life Up to 45 minutes at 15-20°C
Storage Between 10°C - 30°C
Depth 25mm



Rake out loose material from the floor joint. The joint sides should be clean and dry. Remove any grease or oil using Watco Concroff and allow to dry.

Tip - Masking tape can be used to provide neat edges. Deeper holes can be packed using Watco Back Up Rod or similar. Aim to leave 25mm for the Flexible Joint Repair.


It is important to mix the 3 components thoroughly. Empty the contents of the smaller tin into the larger tin and mix thoroughly with a spatula or similar wide bladed tool. A slow speed electric drill and mixing blade can be used but also use a spatula to scrape the inside of the tin. Empty the mixed components into the outer plastic bucket and gradually add the sand, mixing continually. Use immediately. 


Apply by brush and allow approximately 30 minutes to dry (at 20°C). Use at a temperature range of 0°C - 30°C. Trowel into the joint and smooth the surface with a trowel.

Tip – It is easier to achieve a smooth surface if the trowel is wiped with a cloth dampened with white spirit. If masking tape has been used, leave in place for about an hour before removing.

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£109.00 (Ex VAT)

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Delivery options
Next day delivery slots available upon request. Call us on 01483 418418 for details.

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Watco Flexible Joint Repair

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