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We are a Toronto-based company specialized in seamless, fast-curing, polyurea-based spray-on membrane applications which ensure complete durable waterproofing.
Our material can be applied at temperatures as low as -5°C.




Spray-on applications are much faster than roll-on methods.

A seamless fast-curing waterproofing membrane ensures complete durable flat roof repair.

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flat roof waterproofing membrane

Temperature Application Range

Our specialized flat roof polyurea-based materials can be applied at a much greater temperature range, going as low as -5°C, which is an advantage in commercial roofing industry.

Easily Adaptable

Materials used allow for application thickness to be easily adjusted, as required. 

Applications can also be designed to cure at any rate between 30 seconds and 4 hours - curing time will vary depending on the application method.

flat roof waterproofing applications
UV protection for flat roofs

UV Protection

Light-colour surface helps reduce heat absorption.

A UV-protective layer is applied for more durability.

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Call us at (647) 479-4069 or

ask for a Free Quote! 

If you are looking to waterproof large roofs quickly.

We offer spray-on polyurea-based membrane applications that ensure durable results.



Crack Repair

Thanks to monolithic adhesion provided by our products,

flat roof repairs are done quickly and efficiently.

To repair a crack on any concrete surface, a clearly defined procedure is followed: cracks are prepped and then treated with specialized, industrial-strength adhesive, after which they are filled with polymer cement and a waterproofing primer.

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Under traditional repair methods, patching concrete requires a minimum of two-inch demolition in the affected area.

The use of specialized, industrial-strength materials permits patches as thin as 5 mm on any surface, making flat roof repairs much more cost-effective and faster.

EPDM Membrane Repair

A five-layer coating is applied after the roof surface is flattened, to provide an optimal commercial roof repair.

After the entire surface is power washed and valleys are filled with a self-leveling material, a fire-rated protector board is installed. Heavy sheets are then placed to flatten the roof, and the joints between them are detailed.

To ensure durable results, a five-layer coating is applied: a specialized primer, a liquid waterproofing membrane, fleece material, and another layer of primer, followed by UV-resistant coating.

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roof capping

Roof Capping

When aluminum capping shifts, this creates gaps around

roof edges which leads to leakage.

We realign the capping, seal the gaps and coat the entire surface with paint for further protection.

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Call us at (647) 479-4069 or

ask for a Free Quote! 

For any type of roof repair, including crack repair and patching,

ahead of a waterproofing membrane.



For over seven years, Joint Seal Waterproofing, has been providing flat roof repair and  waterproofing in Toronto, the GTA and the surrounding areas. We specialize in polyurea-based membrane applications.


High-strength concrete adhesives allow us to perform all crack repair efficiently, ensuring long-lasting results. 

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Joint Seal Waterproofing Inc.

10 Plastics Ave., Toronto, ON M8Z 4B7

Get a Free Quote

© by Joint Seal Waterproofing Inc.


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