Paver sealing is our flagship service, and we clean and seal pavers across Fort Pierce and the Treasure Coast every week. The prep is what makes or breaks a seal job, not the sealer itself. In our climate, that prep matters more than it does almost anywhere else.
Fort Pierce gets somewhere around 51 to 55 inches of rain a year, well above the national average of about 38. Add near-constant humidity and coastal salt air, and your pavers grow mold and algae fast and pick up stubborn white salt haze on top of it. All of that has to come off before a drop of sealer goes down.
Do You Really Need to Clean Pavers Before Sealing?
You do. Cleaning isn’t an optional first step, it’s the step that decides whether the whole job holds up.
Think about painting over a dirty wall. The paint might look fine for a day, but it never really grabbed the surface, so it starts peeling. Sealer works the same way. Pavers are porous by design, and dirt, grime, mold, and mineral salt sit down in those pores. If the pores are blocked, the sealer has nothing to grab.
Interlocking concrete pavers are dense and strong, but they still absorb. The manufacturing standard most pavers are made to (ASTM C936) allows for a measurable amount of water absorption, which is exactly why contaminants soak in and why a proper clean is non-negotiable before sealing.
What Happens If You Seal Dirty Pavers?
You trap the mess under the coating, and it doesn’t come back out. Whatever was on the surface when you sealed, dirt, stains, mold, is now locked in for good.
On top of that, the seal itself fails early. A sealer that can’t penetrate peels and flakes, and trapped moisture shows up as a cloudy white haze across the surface. Now the pavers look worse than before you started, and the only fix is to strip the sealer and redo the whole job. That’s the reason we won’t seal a surface we haven’t cleaned first.
| Factor | Sealing Over Dirty Pavers | Sealing After a Proper Clean (Our Process) |
|---|---|---|
| Sealer adhesion | Poor, can’t penetrate blocked pores | Strong, pores open and the sealer bonds |
| Appearance | Cloudy haze, trapped stains, uneven finish | True color restored, even matte to “wet look” |
| Lifespan | Fails early, peels and flakes | Roughly 2 to 3 years, longer with a third coat |
| Mold and algae | Locked in, keeps spreading underneath | Killed at the root with algaecide first |
| If it fails | Strip everything and redo | Done right the first time |
Efflorescence: The White Haze You Can’t Seal Over
Efflorescence is the chalky white film you sometimes see on pavers. It’s mineral salt working its way up from inside the paver to the surface as moisture moves through, and our salt air and heavy humidity make it worse here than in drier parts of the country.
New pavers are the usual culprit because the salts are still working out of them. When we run into efflorescence or calcium buildup, we treat it with an acid wash and neutralize the surface before any sealer goes on. Recognized paver-industry guidance is clear on this point: efflorescence should be removed before sealing, not sealed over.
Our Pre-Seal Cleaning Process, Step by Step
Most guides mention one or two prep steps. Here’s the full sequence we actually run, start to finish.
| Step | What We Do | Why It Matters |
|---|---|---|
| 1. Algaecide treatment | Apply algaecide to kill mold, mildew, and algae | Kills growth at the root so it can’t regrow under the seal |
| 2. Joint cleanout | Controlled high-pressure turbo nozzle | Clears weeds, debris, and old sand without over-etching |
| 3. Rinse | Full rinse of the surface and joints | Flushes out everything the treatment loosened |
| 4. Dry | Let the pavers dry fully | Sealer bonds only to a dry surface |
| 5. Re-sand | Fresh low-mineral silica joint sand | Locks the pavers and resists weeds and ants |
| 6. Seal | Two coats of water-based sealer, optional third | Protects color, repels stains, lasts 2 to 3 years |
A quick word on pressure, because this is where DIY jobs go wrong. Too much pressure blasts the sand out of the joints and etches the face of the paver. We use a controlled turbo nozzle for the joints instead of blasting the whole surface, so the pavers get clean without getting chewed up.
The sealer we reach for depends on the material. Brick pavers get a topical sealer, which you can order in matte, semi-gloss, or a glossy “wet look.” Natural stone and marble get a penetrating sealer that soaks in for a natural finish and stays less slippery underfoot. Our paver sealing service uses water-based products from SurfaceLogix and ICT, which handle the slight dampness Florida throws at us better than solvent-based sealers do.
New Pavers vs. Existing Pavers
The prep isn’t identical for both, and it’s worth knowing which situation you’re in.
New pavers need time. The salts have to finish working their way out before sealing, which is why we hold off and clear any remaining haze first rather than trapping that white cloud under a fresh coat.
Existing pavers are a different job. Those need the organic growth killed off, the weeds and old joint sand cleared out, fresh silica sand laid back in, and then the seal. Same finish, different starting point.
What to Do After We Seal: Cure Time Matters
Fresh sealer needs to cure dry, and this is the one part of the job that’s on you. Keep the area dry and don’t drive on it for 48 hours after we seal. Moisture during curing is the fastest way to ruin an otherwise perfect finish.
Turn your sprinklers off and double-check the irrigation timer so it doesn’t kick on overnight. We plan the work around the forecast to keep rain off a fresh seal, which is also part of why the right time of year to seal makes a real difference. Water that reaches the sealer while it’s still setting can leave a cloudy or blotchy finish.
We caution-tape the area when we leave so nobody walks or parks on it by accident. That matters most on shared driveways and in HOA communities, where a neighbor or a delivery driver might not know the surface is off-limits. Give it the full two days and the seal locks in the way it should.
How Long Sealed Pavers Last, and What Shortens It
A properly cleaned and sealed surface holds up for about 2 to 3 years, and a third coat at sealing can stretch that toward 3 to 5. That’s the payoff for doing the prep right. What eats into it is mostly the Florida environment plus a few habits that wear the seal down faster.
Here’s what shortens a seal’s life:
- Constant sun. UV breaks coatings down over time, and we get a lot of it.
- Standing water. Low spots that never drain sit on the seal and cloud it.
- Heavy traffic and turning tires, which grind at the surface on driveways.
- Harsh store-bought cleaners, especially anything acidic or with a degreaser, which can strip the finish.
- Salt and heavy organic regrowth in the joints if the surface goes too long between cleanings.
Protecting your investment mostly comes down to gentle upkeep. Rinse and sweep the pavers, and keep the pressure washer and acidic cleaners off a sealed surface. When water stops beading and the color starts looking flat, that’s your cue to book the next clean and reseal, and how often pavers should be resealed here comes down to our humidity and how much traffic the surface sees.
What Pre-Seal Cleaning Can and Can’t Fix
We’ll always tell you this up front. A good clean lifts mold, algae, weeds, old sand, and most surface staining, and it brings the original color back. That covers the large majority of what people want fixed.
Deeply embedded rust and heavy calcium are the tough cases. We treat those with dedicated rust stain removal and lift as much as possible, and we’ll tell you honestly what to expect from a stain that’s been soaking into the stone for years.
We protect your landscaping the same careful way. We bag downspouts and we soak and neutralize the plants and grass around the work area before, during, and after. To give your greenery an extra buffer, we recommend watering it well around the time of service.
Frequently Asked Questions
How soon after new pavers are installed can they be sealed?
Give new pavers time to let the salts finish migrating out, which can take several weeks depending on the pavers and the weather. We’ll check for efflorescence and clear any that’s present before sealing, so the finish goes on clean.
Can you pressure wash pavers before sealing without damaging them?
Yes, as long as the pressure is controlled. Blasting a paver surface strips the joint sand and etches the face, which is why we run a controlled turbo nozzle on the joints rather than hammering the whole patio.
Does sealing pavers actually prevent weeds and mold?
Sealing plus fresh silica joint sand cuts weeds down and slows mold and algae, mostly by locking the joints so there’s nowhere for them to take hold. It isn’t permanent, but it makes the surface far easier to keep clean between visits.
Should I clean and seal pavers myself or hire a pro?
A pro controls the pressure so the joints and paver faces stay intact, and clears every contaminant so nothing gets trapped under the coating. That’s the difference between a seal that lasts a few years and one you’re redoing next season.
Ready to Seal Your Pavers the Right Way?
If your pavers are looking green, hazy, or faded, we start with the clean that makes the finish last. Paver sealing with us typically runs $850 to $3,000 depending on square footage and how much prep the surface needs, and every paver-sealing job is backed by our one-year warranty. We’re a veteran-owned, licensed and insured Treasure Coast crew, and we set clear expectations before we ever start.
Call us at (772) 678-9596 for a free estimate. Smaller jobs we can quote from photos, and larger paver jobs we’ll come look at in person.
