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Leaking Sydney balcony sealed with polyurethane resin injections

Leak sealing injection of leaking crack in balcony soffit complete - Waterstop Solutions NSW

Leaking Sydney balcony sealed with polyurethane resin injections


Failing gyprock proved to be a leaking crack in the balcony soffit


Our Waterstop Solutions NSW team attended a multi-level apartment building in Sydney and inspected a leaking crack in a balcony soffit where moisture had presented itself as failing gyprock.

As a remedial waterproofing solution to treat the damp crack in the balcony soffit, our Sydney team of leak sealing specialists injected the length of the concrete crack with a hydrophilic polyurethane resin.The injection system creates a three-dimensional waterproof seal inside the building element by injecting a high-quality hydrophilic polyurethane resin under high pressure. The benefit of our leak sealing injection system is that it provides a flexible seal to the full depth of the treated crack. It fault finds and treats unidentified at-risk adjacent areas, offers additional protection to any steel reinforcing in the path of the crack and slows the corrosion to any possible compromised reinforcing steel or yet to be.

Once the leak sealing injections were completed, the injection ports were removed, and the holes were plugged with a repair mortar. The leak seal injected crack in the balcony soffit was coated with 2 coats of reverse side membrane before the Villaboard was replaced and the ceiling was painted to complete the works.

Waterstop Solutions NSW Supervisor received a phone call from the client praising our Sydney technicians for their quality work and attention to detail.





Give us a call to discuss the best protective treatment application for your vertical and horizontal surfaces to help you choose the appropriate product and methods to protect them and how to best prepare the surface before installation for best performance.

If you have any issues with water ingress, rooftop leaks, leaking balcony, leaking basement, wet lift pit, cracking concrete slabs, structural cracks, concrete deterioration, spalling concrete, concrete cancer, deteriorated joints, 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.


It takes licenced remedial waterproofer and leak sealing experts like us at Waterstop Solutions to ensure that the pathways for water to ingress are properly sealed off. A depth of technical knowledge and experience, along with a proud reputation for integrity and reliability, has made Waterstop Solutions the go-to company for many Defect Managers working for major construction companies across Queensland and New South Wales.

We at Waterstop Solutions have the technical and practical expertise to diagnose the source of the leak and will provide you with our recommended solution to achieving an effective, high-quality, long-lasting repair to stop the water ingress with minimal disruption

We believe in and are committed to always delivering high-quality solutions by utilising the right products and techniques for each specific project combined with our industry-leading know-how on tap. We have a large talent pool of specialist leak sealing and concrete repair technicians with Certificate III in construction waterproofing in Queensland and New South Wales that are extensively trained in our systems and project execution methods.

The leadership positions on every Waterstop Solutions project are operated by highly qualified, certified and experienced industry professionals. Our in-house skills and expertise gained from more than 60 years of industry experience provide a full range of high-quality remedial waterproofing and concrete repair works to commercial buildings, civil infrastructures, industrial sites and residential properties. From waterproofing diagnostics, preventative and remediation solutions – All of our waterproofing solutions are quality guaranteed.


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