How to Vet a Commercial Sealcoating Contractor: The Property Manager's Checklist

Commercial sealcoating is a category where the cheap bid is almost always the expensive bid. Thin coats, watered-down sealer, no surface prep, and uninsured crews are how the low number gets to the low number. This is the checklist we'd hand any property manager evaluating commercial sealcoating contractors — including us.

1. Insurance and bonding

Ask for a current Certificate of Insurance naming you as additional insured. Minimums for commercial work: $1M general liability, $1M auto, workers' comp covering all crew members. If a contractor hesitates or quotes a third-party form, walk away. Uninsured contractors are an enterprise risk on your property.

2. Where does their sealer come from?

The single biggest quality variable in sealcoating is the sealer itself. Ask: who manufactures it, what's the spec sheet, and what dilution rate is being applied. A serious contractor knows the answer cold. A bid-shopper buys whatever's cheapest at the supply house and dilutes it heavier to stretch coverage. Asphalt emulsion (AMT) at proper dilution is the standard for commercial work.

3. Equipment and crew size

Commercial lots need pressurized spray equipment and an agitated tank — not a hand-pump wand and a 55-gallon drum. Ask what equipment will be onsite. Ask the crew size. A 20,000 sq ft lot needs a 3–5 person crew minimum; one person is a flag.

4. Surface prep scope in the bid

Read the bid carefully. Does it include power-blowing, crack cleaning, oil-spot priming, and crack sealing of cracks over ¼"? Or is the bid 'sealer only, customer responsible for prep'? Surface prep is 40% of a real sealcoat job. Bids that exclude it are 40% incomplete by definition.

5. Coverage rates and number of coats

Commercial spec is two coats at 60–80 sq ft per gallon per coat. If the bid doesn't specify coverage rate or coat count, it's hiding the math. A contractor stretching a single thin coat at 120 sq ft per gallon will fail in 12–18 months and won't be around to honor the warranty.

6. References — and check them

Ask for three commercial references from jobs 18–36 months old. Not last month's job; an 18-month-old job is the one that tells you whether the work lasted. Call the references and ask whether they'd hire the contractor again.

7. Written warranty

Real contractors put their warranty in writing — typically 1 year on workmanship for commercial sealcoating. A handshake warranty is a no warranty.

8. Local presence

Out-of-state crews chasing the regional market are a recurring problem in this category. They take a deposit, do the work fast, and disappear before the failures show. Verify the contractor has a physical address, local phone, and a track record in your market.

What the low bid usually means

When one bid comes in 30–50% below the others, the explanation is almost always one of: thinner sealer, fewer coats, no prep, uninsured crew, or an out-of-region contractor who won't be back. Occasionally it's a contractor with lower overhead and real efficiency — but verify the checklist above before assuming that's the case.

Vet us too

Summit Surface Partners is happy to send our COI, sealer spec sheets, recent commercial references, and a written warranty in advance of any bid. Call (406) 309-SEAL or request a free assessment.