Two driveways sealed on the same street, the same week, can look completely different a year later. Often the reason isn’t the crew — it’s the type of sealer they used. Here’s the real difference between tar-based and water-based driveway sealers, and why it decides how long your driveway stays protected and jet-black.
The two main types
Driveway sealers fall into two broad camps: tar-based (oil) sealers and water-based (acrylic / latex) sealers. They look similar in the can and even right after application — but they protect very differently.
How tar-based (oil) sealer works
Tar-based sealer is an oil-based liquid asphalt. It bonds chemically into the asphalt surface and penetrates rather than just sitting on top. That gives you a deeper, longer-lasting jet-black finish, stronger resistance to water, road salt and UV, and far better protection against the freeze-thaw cracking that defines Ontario winters. It’s what the industry has trusted for decades for a reason.
How water-based sealer works
Water-based sealer is easier and cheaper to apply, dries fast, and has less odour — which is why a lot of quick operators use it. The trade-off: it forms a thinner film that sits on the surface, fades to grey faster, and generally needs reapplying sooner. In a milder climate it can be fine. Under GTA salt, plows and freeze-thaw, it simply doesn’t hold up as long.
So which lasts longer?
Tar-based, clearly. A proper oil-based seal holds its colour and protection through the brutal part of the Ontario year and keeps water out of the cracks where freeze-thaw damage starts. That’s why a tar-based driveway sealed every 2–3 years can stay in great shape for decades.
Why we only use tar-based sealer
At Royal Sealing, we use real tar-based oil sealer — not the watered-down stuff — because it’s the only thing that delivers a true jet-black finish that actually lasts through GTA winters. Paired with full crack-filling and hand-edged borders, it’s what separates a driveway that looks great for years from one that fades by fall.
What to ask your sealer
Before you hire anyone, ask one simple question: “Is your sealer tar-based or water-based?” If they dodge it or you’re quoted a price that seems too good to be true, you’re probably getting a thin water-based coat. Learn more about what driveway sealing should cost and how often to reseal, or see all the areas we serve across the GTA.
Want a straight answer for your driveway? Royal Sealing gives free, same-day on-site quotes across the Greater Toronto Area — tar-based sealer, hand-edged borders, crack-fill and cleanup included, done in a day.
