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Leak sealing injection works in a below-ground car park

Leak sealing injection around leaking pipe penetration - Waterstop Solutions

Leak sealing injection works in a below-ground car park


We have fixed a leaking pipe penetration and stopped water ingress through a cold joint in the basement ceiling slab with targeted injections of hydrophilic polyurethane resin.

Generally speaking, a cold joint is the point of connection where old and new concrete meet. It commonly occurs during construction when one batch of concrete has begun to set before the next batch is added.

The old and the new concrete do not intermix and a so-called “cold joint” is formed as a result, creating a weakness in the concrete and a possible passageway for water intrusion.

Some defects in concrete structures are commonly caused by penetrations through the concrete made for service lines.

Pipe penetrations are sealed with a cement-based plug or a patch from the interior side of the building during the original construction. The plug does not seal the gaps throughout the whole wall or slab and the bond to the concrete usually fails over time. This pathway allows water to find its way into the gaps and seeps through the concrete around the pipe penetration.

When a hole for the service pipeline is drilled through the concrete, the coring process may cause damage to the concrete structure by creating cracks. The core hole can often provide a direct path for water to pass through the concrete structure.

Such passageways for water into buildings is what Waterstop Solutions specialises in sealing accurately and effectively.


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, 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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