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Effective Repairs For Leaking Concrete Swimming Pools

Leaking cracked concrete swimming pool

Effective Repairs For Leaking Concrete Swimming Pools

Concrete Crack Leak Sealing Injection With High-Quality TDI Polyurethane* Is The Best Way To Stop A Leaking Concrete Pool Crack.


This is because the TDI polyurethane is injected deep into the building element forced under high pressure. This high-quality fluid resin is injected into concrete cracks, rock fissures and other voids in concrete structures. Once the product is inside the crack, it chases the water present in the crack and begins to foam and expand filling the entire crack.

The polyurethane undergoes a chemical transformation from a liquid to a solid when reacting with water. The product has a very short cure time, making it ideal for active leak sealing. It sets in minutes, forming a dense, durable and flexible seal preventing future water leaks.

The low viscosity allows for the fine cracks with a width less than 0.2mm to be sealed, so any leak in concrete structure can be sealed in concrete structures.

Polyurethane crack injection is without a doubt the most effective leaking crack repair method in concrete swimming pools. It is commonly used in civil, commercial and residential leaking concrete crack injection.

There are many different types of polyurethane products available in the market. Waterstop Solutions uses the highest quality polyurethane resin formulations, which ensures the optimum cure time, viscosity, efficient and reliable results for each different type of application.

The TDI polyurethane that we at Waterstop Solutions commonly use for leak sealing injection, is the best injection product available offering superior performance benefits including permanent flexibility, very low shrinkage, water potable, low viscosity and a hydrophilic reaction.

Waterstop Solutions specialises in skilled techniques in high-pressure injection with a high-quality TDI polyurethane to the targeted area to form a deep seal and stop water from leaking through the concrete cracks.

Waterstop Solutions utilises the same techniques and products that we have approved for use on major civil structures with a design life of 100 years.

*The TDI polyurethane not to be confused with the inferior MDI polyurethane, is hydrophilic as compared to hydrophobic, providing a considerably higher adhesion and less shrinkage than MDI polyurethanes while still meeting AS4020 (Australian Standard for potable water).


Concrete Pool Leak Sealing Injection – The Waterstop Solutions Process On How To Stop Leaking Cracks In Concrete Swimming Pools


Concrete crack leak sealing involves injecting a fully flexible water reactive hydrophilic polyurethane under high pressure.

High-pressure injection of high-quality TDI liquid polyurethane forces the material into leaking cracks, joints, voids and other defects.

We use the highest quality injection product available offering superior performance benefits including:

  • Permanent flexibility
  • Very low shrinkage
  • Water potable, compliant to AS4020 (Australian Standard for potable water)
  • Low viscosity
  • Hydrophilic reaction (the product is actively chasing moisture, filling and sealing the crack by rapid reaction with the water present in the crack)


Polyurethane Concrete Crack Injections step by step.

Polyurethane Concrete Crack Injections step by step.


Cracked leaking concrete pool injected and plugged

Cracked leaking concrete pool injected and plugged.

Image of concrete swimming pool crack repair carried out by Waterstop Solutions with high-pressure TDI polyurethane injection.
Pulled and plugged and ready for the next step in surface detailing to be carried out by the pool renovation specialist.


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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