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Cracking concrete – Structural repair with Epoxy injection

Structural concrete crack repair - Epoxy injection - Waterstop Solutions

Cracking concrete – Structural repair with Epoxy injection

Cracking concrete slabs – Structural restoration

In the light of the current media coverage of the building defect crisis in Australia, we have had an influx of inquiries regarding observed potential structural cracks in concrete slabs and other types of building defect issues such as failed waterproofing.

Waterstop Solutions helps restore the structural integrity of concrete by injecting high-quality liquid epoxy resin into defects in the concrete structure. We repair everything from basic hairline fractures in concrete right through to more serious structural damage. We specialise in concrete crack injection for structural crack repair and dynamic crack repair.


Depending on the type of crack, we normally use either Polyurethane (PU) for flexible crack repair of dynamic concrete cracking or Epoxy for structural concrete crack repair.

    1. Syringe or gravity injection – Low Pressure
    2. Paste-on injection packers – Medium Pressure
    3. Packer injection – High Pressure


Epoxy injection for structural crack repairs is normally performed when you are attempting to increase the structural condition of a concrete element that is currently cracked.

Before injection commences, where we effectively glue the crack together, it is important to understand: how the crack came about in the first instance; if there is a need for structural repair; and whether the crack could form again if epoxied.

If the crack has the potential to reappear, a new joint could be cut or, if non-structural, the concrete element could be injected with a polyurethane.

When structural crack repairs are required, epoxy resins are usually the desired product for the application.

Epoxy resin products are specifically formulated for this application, offering physical properties higher than that of concrete.  Injection epoxy resins are required to have low viscosity so they can be injected into tight cracks.

Premium epoxy resins are moisture insensitive (will bond to wet concrete) and can have curing properties from semi rigid through to flexible.

Our delivery systems for epoxy injection include low-pressure syringes, balloons, gravity, dual caulking-gun systems and high-pressure injection (similar to the polyurethane injection system).

Waterstop Solutions’ extensive range of resins and our raft of delivery systems have successfully tackled every scenario that we have encountered to date – from under bridges, to under water on dam walls.


If you have any issues with cracking concrete slabs, structural cracks, concrete deterioration, moisture, seepage, efflorescence, rising damp and/or high-flow active leaks in concrete structures, we would be happy to assist you. You are welcome to contact us with any questions that you may have.  

Brisbane office: (07) 3205 1899   


Sydney office: 02 9346 8308   

Email: [email protected]



Are you interested in finding out more about the various remedial building services we are providing?

Please click on the image below to download Waterstop Solutions Capability Statement

Waterstop Solutions Capability Statement

Waterstop Solutions Capability Statement is now available to download as PDF. (The image is clickable and opens up a link to our Capability Statement). 




Good maintenance begins with a proactive approach to maintain, keep, preserve and protect a building. 

Remember that seepage/water ingress into areas such as balconies, basements, concrete roofs, car parks and retaining walls, should not be ignored – call a remedial waterproofing professional today for an assessment to provide you with the best solution for your situation.

At Waterstop Solutions, we carry out a wide range of remedial works to concrete structures post-construction stage in Brisbane, Gold Coast, Sunshine Coast, Sydney and outlying areas in Queensland and New South Wales.

Equipped with major civil works experience, we can quickly determine the best approach to rectify all seepage and concrete deterioration issues.


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