Interlock Sealing in Toronto: 2026 Cost, Preparation, Sealer Types and When to Reseal
Toronto weather is hard on interlocking pavers. Freeze-thaw cycles, road salt, rain, dirt and summer sun gradually take their toll on both the pavers and the joints between them.
Sealing can help protect a properly installed interlock surface and bring some colour back to faded pavers. But it is not a repair product. If the driveway is sinking, moving or holding water, sealing it first is usually money spent in the wrong place.
For most homeowners, the practical questions are fairly straightforward: what does sealing cost, what should be included in the job, how long should it last, and how do you know when the surface actually needs it?
How Much Does Interlock Sealing Cost in Toronto?
Published GTA pricing commonly puts interlock sealing somewhere around $1.50 to $3.00 per square foot. That is a useful starting point, but it is a wide range for a reason.
A contractor is not just pricing the sealer. The condition of the interlock can make a much bigger difference than the product itself.
For example, a clean 1,000-square-foot driveway with sound joints is a very different job from a 500-square-foot driveway covered in moss with low joints, stains and several sunken pavers.
As a rough budgeting exercise, the published range would put the sealing portion of a project at approximately:
| Area | Approximate sealing cost |
|---|---|
| 150 sq. ft. | $225–$450 |
| 300 sq. ft. | $450–$900 |
| 600 sq. ft. | $900–$1,800 |
| 1,000 sq. ft. | $1,500–$3,000 |
| 1,500 sq. ft. | $2,250–$4,500 |
These are not guaranteed contractor prices. Cleaning, polymeric sand, repairs, difficult access, minimum charges and HST can all change the final quote.
The useful thing about a square-foot price is that it gives you a starting point. It should not be the only number you compare.
Why two contractors can quote very different prices
Preparation is usually where the difference comes from.
One contractor might be quoting for a basic clean and seal. Another might be including extensive pressure washing, joint-sand replacement, weed removal and several paver repairs.
Those are not equivalent jobs.
Before comparing prices, find out exactly what is included.
What Does Interlock Sealer Actually Do?
Sealer is a surface treatment. Depending on the product, it can help reduce water and contaminant penetration, improve stain resistance, enhance colour and make the surface easier to clean.
Some sealers also help stabilize jointing material. Others are primarily intended to protect or alter the appearance of the pavers.
That distinction matters. “Interlock sealer” is not one specific type of product.
A good candidate for sealing is a driveway or patio where the pavers are already stable, the drainage works and the joints are in reasonably good condition.
Sealing is not a substitute for fixing the installation underneath.
Sealing can help with:
- Surface staining and dirt
- Water and contaminant penetration
- Faded-looking pavers
- General surface weathering
- Easier routine cleaning
- Joint stabilization when the selected product is designed for it
Sealing cannot fix:
- Sinking pavers
- A failed base
- Poor grading
- Persistent drainage problems
- Broken edge restraints
- Major joint-sand loss
- Pavers that are continually moving
If water pools in the same area every time it rains, putting sealer on the surface does not solve the reason the water is there.
Preparation Matters More Than Most Homeowners Realize
A large part of a good sealing job happens before the sealer comes out.
1. Inspect the surface
The contractor should look at the pavers, joints, edges and drainage before deciding that sealing is appropriate.
This is when problems such as loose pavers, settlement, low joints and an old failed coating should be identified.
2. Clean the interlock
Dirt, moss, algae, stains and other contamination need to be removed.
Pressure washing can be useful, but using maximum pressure everywhere is not automatically better. Too much pressure can remove joint material and create more work.
The goal is a clean surface without damaging the joints or pavers.
3. Deal with the joints
The condition of the joints should be checked after cleaning.
If the existing sand is too low or has been washed out, additional material may be needed. If polymeric sand is being installed, its own installation and curing requirements need to be followed.
This is one reason a contractor should not promise a single fixed price without seeing the surface.
4. Make repairs before sealing
A few loose or sunken pavers can often be lifted and reset as part of the preparation.
That is very different from trying to seal an entire driveway that has widespread settlement.
If the base has failed, the affected area may need to be lifted, rebuilt and re-levelled. Sealer won’t make a bad base good.
5. Let the surface dry
The surface needs to meet the moisture and weather requirements of the product being used.
This is especially important after pressure washing or polymeric sand installation.
6. Apply the product correctly
Coverage rate, application method, number of coats and temperature requirements vary between products.
A contractor should know the product they are applying and be able to provide its technical information if you ask.
Choosing Between Natural-Look and Wet-Look Sealer
The biggest visual decision is usually whether you want the interlock to look much like it does now or have a deeper, richer appearance.
Natural-look sealer
Natural-look products are intended to protect the surface without dramatically changing its appearance.
They are a good option if you like the existing colour and do not want the driveway to look freshly “wet.”
Wet-look or colour-enhancing sealer
These products can make concrete pavers look darker and more saturated.
They can look excellent when applied properly, but they also make application problems more noticeable. Uneven coverage, excess product and inadequate cleaning can leave an inconsistent finish.
Wet surfaces can also become more slippery depending on the product.
For steps, walkways and pool areas, slip resistance deserves particular attention.
Penetrating vs. Film-Forming Sealers
There is another important distinction between products.
Some sealers penetrate the surface. Others leave more of a film or coating on top.
Film-forming products can provide a stronger visual effect, but they also require careful preparation. Existing contamination or efflorescence can become a problem if it is trapped beneath a coating.
The product’s technical documentation should tell you what type of surface it is intended for and how it needs to be applied.
Don’t choose a product solely because the label says “wet look” or because it is cheaper.
When Is the Best Time to Seal Interlock in Toronto?
There isn’t one magic month.
The job needs a suitable stretch of weather, and the requirements depend on the product.
In general, you want:
- Appropriate air and surface temperatures
- A dry surface
- No significant rain immediately after application
- Enough time for the product to cure
- Conditions that match the manufacturer’s instructions
For example, Techniseal’s documentation for one of its wet-look joint-stabilizing products specifies an application temperature of 50°F to 85°F, or approximately 10°C to 29°C, along with a dry surface and no rain forecast for the following 24 hours.
That is a product-specific requirement, not a rule that applies to every sealer.
This is why a contractor telling you that every sealer needs exactly the same temperature or curing time should be able to explain where that requirement comes from.
How Long Does Sealing Last?
There isn’t a reliable single number.
For many residential applications, roughly two to five years is a reasonable planning range, but some surfaces will need attention sooner and others can go longer.
The useful question is what is happening to your particular surface.
A driveway exposed to vehicle traffic, road salt and full sun is going to experience more wear than a sheltered patio.
The quality of preparation also matters. A good product applied to a dirty or damp surface is not going to perform as intended.
Signs Your Interlock May Need Resealing
You don’t need to reseal simply because a certain number of years has passed.
Look at the condition of the surface.
The finish may have become noticeably duller, staining may be harder to remove, or an existing coating may be visibly breaking down.
You may also notice that the joints need attention.
One thing to avoid is treating every joint problem as a sealing problem. If sand is disappearing because the joints are damaged or the surface is being washed out, the underlying issue needs to be addressed.
Likewise, don’t put a new coating directly over an old coating that is peeling or whitening without determining whether the two products are compatible.
When You Should Not Seal
Sometimes the best advice a contractor can give you is to hold off on sealing.
The driveway is sinking
If a section has settled, it may need to be lifted and the base corrected.
Pavers are moving
Loose or rocking pavers should be dealt with before sealing.
Water is pooling
Look at grading and drainage first.
The joints are badly depleted
The joints may need to be cleaned and refilled before sealing.
The existing coating is failing
Peeling, whitening or patchy areas need to be assessed before another product is applied.
You don’t know what is already on the surface
An unknown old coating can create compatibility problems. Putting another product over it without checking is a gamble.
In all of these cases, sealing can be part of the eventual job. It just shouldn’t be the first step.
Sealing vs. Repair
A simple way to think about it is:
| Condition | Likely starting point |
|---|---|
| Stable pavers with faded or weathered appearance | Sealing |
| A few loose or sunken pavers | Local repair |
| Widespread loss of joint material | Resanding |
| Large areas of settlement | Lift and re-level |
| Persistent pooling water | Drainage or grading assessment |
| Failed base | Reconstruction |
| Peeling or incompatible old coating | Assessment and possible coating removal |
The cheapest quote is not necessarily the cheapest solution.
If a driveway needs its base rebuilt and you spend money sealing it instead, you may simply end up paying for the sealing again after the repair.
Driveways vs. Patios
The same sealer isn’t necessarily the best choice for every interlock surface.
Driveways
Driveways have to deal with vehicle traffic, turning tires, salt and repeated freeze-thaw exposure.
For that reason, the condition of the pavers and joints is particularly important.
Patios
Patios generally have less mechanical wear. Appearance and stain resistance may be more important, especially around outdoor dining areas.
Walkways and Steps
Think about traction before choosing a glossy finish.
A surface that looks great when dry can behave differently when wet, depending on the product.
Pool Decks Need Extra Attention
Pool areas are frequently wet, so slip resistance should be considered before choosing a finish.
The contractor should also confirm that the product is appropriate for the particular paver and the conditions around the pool.
A glossy finish isn’t automatically better simply because it makes the colour look richer.
What About Permeable Interlock?
Permeable interlocking pavement needs more caution.
Unlike conventional interlock, permeable systems are designed to allow water to move through the joints and into the drainage layer underneath.
A conventional film-forming sealer may therefore be inappropriate.
Before sealing a permeable installation, find out what system was installed, what joint material was used and whether the paver and sealer manufacturers approve the treatment.
The priority with permeable pavement is maintaining its ability to drain. A nicer-looking surface is secondary.
How to Compare Interlock Sealing Quotes
When you get two or three quotes, don’t just compare the price per square foot.
Ask each contractor:
- How many square feet are you pricing?
- What cleaning is included?
- Is weed and moss removal included?
- Is joint-sand replacement included?
- Are loose or sunken pavers repaired?
- What sealer are you using?
- How many coats?
- What is the expected coverage rate?
- What weather conditions are required?
- How long before people can walk on it?
- How long before vehicles can use it?
- Is HST included?
- Is there a warranty?
The exact product is particularly important.
“Premium sealer” doesn’t tell you much. A product name and technical data sheet do.
Why small projects can cost more per square foot
A small walkway may have a higher square-foot price than a large driveway.
The contractor still has to travel to the property, set up equipment, clean the surface and return everything to normal afterward.
Those costs don’t disappear just because the area is small.
Is Interlock Sealing Worth It?
If the interlock is structurally sound, sealing can be a worthwhile maintenance job.
It makes the most sense when:
- The pavers are stable.
- Water drains properly.
- The joints are in reasonable condition.
- The surface can be properly cleaned.
- The chosen sealer is compatible with the pavers.
- You want additional protection, easier cleaning or a different appearance.
It makes less sense when the surface has major structural problems.
In that situation, put the money toward the repair first.
Frequently Asked Questions
How much does interlock sealing cost in Toronto in 2026?
Published GTA estimates commonly fall around $1.50–$3.00 per square foot for sealing. The final price can be higher when the job requires extensive cleaning, polymeric sand, repairs or difficult access.
How much does it cost to seal a 600 sq. ft. driveway?
Using the published $1.50–$3.00 per square foot range, the sealing portion would be roughly $900–$1,800.
The actual quote depends on the condition of the driveway and what preparation is included.
Does sealing stop weeds?
No.
Sealing may help stabilize suitable joint material, but it doesn’t permanently prevent weeds. If the joints are full of organic material or have lost most of their sand, they should be dealt with as part of the preparation.
Can I seal interlock myself?
Yes. The application itself isn’t necessarily complicated.
The preparation is where DIY jobs often go wrong. The surface needs to be properly cleaned, the joints need to be in suitable condition, and the product needs to be applied under the right conditions and at the correct coverage rate.
Can interlock be sealed after installing polymeric sand?
It depends on the products.
Some systems require a specific waiting period after polymeric sand installation. Techniseal, for example, specifies a 30-day waiting period after polymeric sand installation for one of its joint-stabilizing products.
Check the instructions for the actual sand and sealer being used.
Can I seal over old sealer?
Not automatically.
The existing coating needs to be checked for condition and compatibility. If it is peeling, whitening or badly worn, simply adding another coat can make the problem worse.
Does sealing prevent pavers from sinking?
No.
If pavers are sinking, the cause is generally related to the base, soil, drainage or installation. Sealer is a surface treatment and cannot correct those problems.
How often should I reseal?
There is no universal schedule.
A rough two-to-five-year range is reasonable for many residential applications, but exposure, traffic, product choice and preparation all affect how long the treatment lasts.
Look at the surface rather than resealing automatically on a calendar.
What is the best month to seal interlock in Toronto?
There isn’t one.
The best time is when the weather and surface conditions meet the requirements of the particular product. A dry stretch with suitable temperatures is more important than whether it happens to be May, June or September.
Is wet-look sealer better than natural-look sealer?
Not necessarily.
Wet-look products can deepen the colour and give the pavers a more noticeable finish. Natural-look products are more subtle.
The right choice depends on the appearance you want, the type of paver and where the surface is being used.
Bottom Line
Interlock sealing is maintenance, not a cure for a failing driveway.
If your pavers are stable, the joints are in decent shape and water drains properly, sealing can help with appearance, cleaning and surface protection.
If the driveway is sinking, moving or holding water, fix that first.
And when comparing contractors, look beyond the square-foot price. Find out what preparation is included, what product will be used and how the surface needs to be treated before and after application.
A good sealing job starts well before the sealer is sprayed or rolled onto the pavers.