How to Choose a Commercial Sealcoating Contractor in South Florida

Sealcoating is one of those services where the finished job looks identical whether it was done right or done badly — for about six months. Then the difference becomes obvious, and by then the contractor who cut corners is long gone.

That’s the core problem for a property manager collecting bids: the surface you’re inspecting on day one tells you almost nothing. Two crews can lay down a lot that looks equally black and uniform, and one of them used a properly mixed commercial-grade sealer on a clean, prepped surface while the other over-diluted it and sprayed over dirt. Both look great. Only one is still protecting your asphalt next year.

So you have to evaluate the contractor, not the finish. Here’s what actually separates them.

1. They Prep Before They Seal

This is the single biggest differentiator, and it’s where most of the shortcuts happen — because prep is labor, and labor is what a lowball bid cuts.

Sealer bonds to clean asphalt. It does not bond to dirt, dust, oil, or vegetation. A contractor doing the job properly will:

• Thoroughly clean the surface — sweeping, blowing, and power cleaning as needed to remove all debris.
• Treat oil and fuel spots with a primer or specific treatment. Sealer will not adhere to petroleum-contaminated asphalt, and untreated spots will bleed through and fail.
• Fill cracks first. Sealcoating over open cracks accomplishes nothing structurally — water still gets to the base. Crack filling is a separate step that has to precede the seal.
• Repair active damage first. Sealcoat is a protective surface treatment, not a repair. Spraying it over potholes or alligator cracking just conceals a problem that keeps growing underneath.

Ask directly: “Walk me through your surface preparation, step by step.” A contractor who does it right will answer in detail without hesitating. A contractor who doesn’t will get vague fast.

2. They’re Transparent About the Material

The sealer itself, and how it’s mixed, determines how long the job lasts.

Over-dilution is the industry’s quiet epidemic. Sealer concentrate gets mixed with water and additives, and a crew that adds extra water stretches its material across more square footage at a lower cost. The lot still comes out black. It just wears off in a fraction of the time.

Ask directly: “What product are you using, and what’s your mix ratio?” You want a contractor who names the specific commercial-grade product, follows the manufacturer’s specified mix, and doesn’t get cagey about it. Ask whether they can provide the product data sheet. Ask how many coats are included and how they determine coverage rate.

If the answers are fuzzy, that’s your answer.

3. They’re Licensed, Insured, and Willing to Prove It

Do not take this on assurance. Ask for the documentation and actually look at it:

• Proof of licensing appropriate to the work in your jurisdiction. Verify it independently rather than accepting a number on a business card.
• General liability insurance — request a current certificate of insurance, and confirm the coverage is active and adequate for the size of your property.
• Workers’ compensation coverage. This one gets skipped constantly, and it matters enormously. If an uninsured crew member is injured on your lot, the exposure can land on the property owner.

A legitimate commercial contractor produces these immediately and without friction. Hesitation, excuses, or “we’ll send it over” that never arrives is disqualifying — not a red flag to weigh against price.

4. They Understand South Florida Specifically

Asphalt behaves differently here, and a contractor who doesn’t account for that will make avoidable mistakes.

The relevant knowledge includes: how intense year-round UV accelerates binder oxidation, how humidity and afternoon storms affect cure time, why our rainy season makes water intrusion the primary failure mode, and how coastal salt air factors in. This is the reason sealcoating cycles in South Florida run tighter than the national rule of thumb.

Ask directly: “How do you schedule around our weather, and what’s your cure time before we can reopen the lot?” Someone who’s worked this market for years will have a clear, practiced answer about weather windows and rain contingencies. Someone who doesn’t will improvise.

5. They Do Commercial Work, Not Just Driveways

Commercial lots aren’t big driveways. They involve phasing so the property stays operational, coordination with tenants and business hours, ADA-compliant striping layouts, traffic flow and signage, drainage considerations, and the equipment and crew size to complete large areas within tight weather windows.

Ask for commercial references — ideally properties similar to yours in size and type — and actually call one or two. Ask about scheduling, disruption, cleanup, and how the lot looked a year later. That last question is the one that matters.

6. Their Proposal Is Specific

A serious commercial bid is a scope document, not a number on a page. It should clearly spell out:

• Total square footage being treated
• Surface preparation steps included
• Crack filling and any repair work, itemized separately
• Product name and number of coats
• Striping and restriping scope
• Timeline, phasing plan, and cure/reopen window
• Warranty terms

If two bids differ substantially in price, the difference is almost always in the scope — fewer coats, thinner material, less prep, no crack fill. A vague one-line quote isn’t a competitive price; it’s an unspecified promise. Get every bid detailed enough that you’re comparing the same work.

The Lowest Bid Warning

There’s a reason the cheapest quote is usually the cheapest quote.

Sealcoating has a real material cost and a real labor cost, and those don’t vary dramatically between honest contractors. When a bid comes in far under the others, that gap came from somewhere — diluted material, skipped prep, a single thin coat instead of two, no crack filling, or a crew that isn’t insured.

You’ll pay the difference later, when the seal fails early and you’re back in the same conversation a year ahead of schedule — or worse, when neglected cracks have let water into the base and you’re facing repair costs that dwarf the savings.

The right way to evaluate bids is cost per year of protection, not cost per job.

Questions to Bring to Every Bid

Print this and use it:

1. Walk me through your surface prep, step by step.
2. What product are you using, and what’s the mix ratio?
3. How many coats are included?
4. Is crack filling included, or itemized separately?
5. Can I see your license, COI, and workers’ comp certificate?
6. Can you give me three commercial references in South Florida?
7. What’s your weather contingency and cure time?
8. What does the warranty cover, and for how long?

The contractor who answers all eight clearly and without hedging is the one you want — regardless of where their number falls.

Talk to Sealmasters

Sealmasters Sealcoating works with commercial properties across South Florida, and we’re happy to answer every question on that list before you commit to anything.

Request a free commercial pavement assessment and we’ll walk your lot with you and put a detailed, itemized scope in writing.