Toronto · GTA · Since 2010
Permanent Waterproofing & Concrete Restoration
Joint Seal is a Toronto-based company specializing in concrete rehabilitation and waterproofing. Tested to Ministry of Transportation Ontario standards, our applications are rated to last 25 years — more than doubling the useful life of repaired structures.
Our Services
Concrete repair & waterproofing for any structure
We specialize in commercial and high-rise residential applications and provide lasting solutions for any concrete surface — including expansion joints and ledge beams.
Balcony Waterproofing & Repair | Joint Seal Waterproofing
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Elevator Pit Waterproofing | Joint Seal Waterproofing
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Flat Roof Repair & Waterproofing | Joint Seal Waterproofing
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Parking Garage Waterproofing | Joint Seal Waterproofing
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Manhole Restoration & Waterproofing | Joint Seal Waterproofing
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Hospital & Medical Facility Waterproofing | Joint Seal Waterproofing
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Residential Waterproofing & Concrete Repairs | Joint Seal Waterproofing
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Concrete Sidewalk & Driveway Repair | Joint Seal Waterproofing
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Concrete Stair Repair | Joint Seal Waterproofing
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Traffic Surface Repair & Waterproofing | Joint Seal Waterproofing
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Utility Room Floor Coating & Waterproofing | Joint Seal Waterproofing
Learn more →Our Clients
Trusted by property managers, builders & institutions
A selection of the organizations we've delivered waterproofing and concrete restoration for across Toronto and the GTA.
Why Joint Seal
Built to last, installed from the inside
25-Year Materials
Industrial-strength, MTO-rated applications built to survive harsh Ontario conditions.
No Excavation
High-strength adhesives let us repair from inside pits and garages — saving cost and disruption.
Polyurea Membranes
Fast-curing, seamless waterproofing that restores full water impermeability.
Commercial & High-Rise
Trusted on parking garages, condo towers, hospitals, and airports across the GTA.
Repair Types
Specialized methods & materials
Concrete Surface Repair | Joint Seal Waterproofing
Learn more →Concrete Crack Repair | Joint Seal Waterproofing
Learn more →Expansion Joint Waterproofing | Joint Seal Waterproofing
Learn more →Concrete Patching | Joint Seal Waterproofing
Learn more →Polyurea-Based Membranes | Joint Seal Waterproofing
Learn more →Testimonials
What clients say
“Joint Seal is our only elevator pit water-prevention specialist — a one-stop shop with excellent results for any type of pit. Great team, great communication. I'd recommend JSW any day of the week.”
“As the owner of multiple 100+ year-old homes in Toronto's west end, I've had more than one leaky basement. Joint Seal always comes up with the right solution — and their waterproofing actually works. I've never had a leak come back.”
From the field
Recent projects & insights
Floor Patching Solutions for Food-Processing Facilities
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Sealing Cold Joints for Lasting Waterproofing Results
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Coating Solutions for Mechanical Room Floors
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Starting the Year: Elevator Pit Waterproofing with Polyaspartic Coating
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Ensuring Safety and Durability: Expansion Joint Repair at Toronto Pearson Airport's Terminal 3
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Trench Drain Repair and Ramp Coating - Durable Waterproofing Results
Read →Have a leak or failing concrete?
Tell us about your structure and we’ll recommend a lasting fix. Free quotes across Toronto and the GTA.