Sealcoating vs Asphalt Resurfacing: Which Does Your Lot Need?
Last updated: By The Pavement Desk
Sealcoating is maintenance on a surface that still works, applied on a repeating cycle and usually paired with crack sealing and fresh markings. Resurfacing is what you do when the mat itself is spent. Applying sealer to a lot that needed resurfacing is the most common waste in this trade, because it looks like a fix for one season and changes nothing underneath.
Once the approach is settled, AsphaltPavingIndex's own dataset lists 96 sealcoating contractors across the Greater Toronto Area at an average Google rating of 4.84★ over 5,220 reviews (August 2026), so you can move straight from this page to a ranked shortlist for the bid list.
This page compares the two approaches on scope, evidence and disruption. Rates live in the linked cost guides, where every figure carries the named source it came from.
Sealcoating or Resurfacing: what actually separates the two on a lot?
AsphaltPavingIndex built this side-by-side around the things that decide the choice on a working site: what each approach does, what it leaves untouched, and what the bid has to show before two prices can be compared at all.
| Criterion | Sealcoating | Resurfacing |
|---|---|---|
| What it is for | Slowing oxidation and keeping water out of a surface that is still sound | Replacing a worn surface layer once sealing can no longer hold it together |
| Condition it suits | Faded, oxidised surface with cracking that can still be routed and sealed | Ravelling, extensive cracking, rutting, or a mat that has been patched repeatedly |
| What it cannot address | Anything structural: alligator cracking, soft base, ponding water, sunken areas | The same base problems, unless the scope includes full-depth repair before paving |
| Usually paired with | Routed crack sealing and re-striping after the sealer cures | Milling or full-depth repair, structure adjustments, then fresh markings |
| Weather window | Warm, dry conditions with a cure window and no traffic on the surface | The hot mix season, since asphalt plants in Ontario run seasonally |
| Time out of service | Short per section, but the whole treated area must stay clear while it cures | Longer per phase, and the phasing plan usually decides the schedule |
| Repeat cycle | A recurring line in the operating budget, repeated on a cycle | A capital event, planned years apart |
| Evidence the bid should show | Number of coats, coverage rate, whether the sealer is diluted, crack sealing priced separately, and the cure closure per section | Where the failed areas are, mill or overlay, mix and compacted lift thickness, and the unit rate for base repair found on site |
Which surfaces call for sealcoating?
Seal when the surface is sound and you are protecting an asset rather than repairing one. It is the cheap end of the maintenance cycle and it works, provided the cracks are sealed first and the lot can be kept clear while it cures.
- The mat is oxidised and faded but not ravelling, and cracks can still be routed and sealed.
- The lot drains, with no ponding and no sunken areas.
- You can close sections long enough for the sealer to cure without traffic on it.
And which call for resurfacing?
Resurface when the surface layer is spent. Once a lot ravels, ruts, or carries so many patches that new ones keep appearing at their edges, sealer is cosmetic. Resurfacing replaces the worn layer and, done properly, addresses the failed areas underneath first.
- Cracking is extensive or has moved into the interconnected alligator pattern.
- The lot has been patched repeatedly and new failures keep appearing next to old repairs.
- The surface is ravelling, so loose aggregate is coming up under traffic.
How does the choice play out on a working site?
Walk a lot with a bidder and the diagnosis usually settles itself. Here is what each observation points to:
- Faded surface, cracks still tight
- Seal and crack seal
- Interconnected alligator cracking
- Base failure, not a sealing job
- Water standing a day after rain
- Grading or drainage first
- Loose aggregate under traffic
- Surface is ravelling, resurface
- Patches failing at their edges
- The mat is past sealing
A bidder who proposes sealer without walking the lot is quoting a product, not a scope. Ask what was found and where, get it in writing, and expect any honest resurfacing bid to carry a unit rate for the failed base that is discovered once the surface comes off.
Frequently asked questions
How do we know whether our lot needs sealing or resurfacing?
- Look at the cracking pattern and at where water sits. Tight individual cracks in an oxidised but otherwise intact surface are a sealing and crack sealing job. Interconnected cracking in the alligator pattern, ruts, ravelling, or water standing a day after rain are all signs that the layer, or what is under it, has failed. Sealer over any of those changes appearance for one season and nothing else.
Does sealcoating repair cracks in a parking lot?
- No. Sealer is a surface treatment that slows oxidation and keeps water out of the top of the mat. Cracks are treated separately, usually by routing them out and filling them, and that work is priced as its own line. Check the bid for whether crack sealing is included at all, and whether it is routed or simply overbanded on the surface, because the two are not the same job.
How long does the lot have to stay clear after sealing?
- Long enough for the sealer to cure with no vehicles on it, which is why the phasing and the notice to tenants matter as much as the product. Ask each bidder to state the closure per section, not just for the lot overall, and to say what happens to the schedule if it rains on the application day. On a tenanted site those two answers decide whether the job is workable.
Can we seal now and resurface later to spread the cost?
- Sometimes, and only if the surface is genuinely still sound. Sealing a lot that has already failed structurally does not defer the resurfacing; it just spends money on a coating that sits over the failure. Where the lot has areas in both conditions, the practical route is repairing and resurfacing the failed sections and sealing the rest, priced as separate line items so the split is visible.
Questions to ask your contractor
- Is crack sealing priced separately, and is it routed or overband? How the line items price out
- How many coats, at what coverage rate, and is the sealer diluted?
- How long must each section stay closed to vehicles while it cures?
- Is re-striping to the existing layout included after the sealer cures?
- What happens to the schedule if it rains on the application day?