When a parking lot starts showing cracks, faded striping, potholes, worn asphalt, or ADA layout concerns, most property owners and managers do the responsible thing: they request bids.
That is smart. Comparing proposals is part of good property management. But in parking lot maintenance, the lowest number on paper is not always the lowest cost in the long run.
At CasTech, we see a recurring issue across the industry: parking lots being sealcoated, striped, patched, or repaired by contractors who win the job on price but remove important parts of the process – preparation, material quality, proper application rates, quality control, insurance, follow-through, or long-term accountability.
This article is not about criticizing every low bid. A competitive price is not automatically a bad price. The real issue is when a bid is low because the contractor has removed the parts of the job that make the work last.
Sealcoating Is Not Just Black Paint
One of the most common misunderstandings about sealcoating is that it is simply a black coating applied to make asphalt look new. That is not accurate.
Sealcoating is a pavement maintenance process designed to help protect asphalt from sunlight, water, debris, oil, gasoline, and other wear. It also improves the appearance of a paved surface by giving it a clean, uniform finish.[1]
When done correctly, sealcoating is part of a long-term pavement maintenance plan. When done poorly, it may look good for a few days or weeks and then begin to fade, track, wear unevenly, or fail much sooner than expected.
Where Cheap Sealcoating Goes Wrong
A quality sealcoating job depends on several things working together: proper cleaning, surface preparation, crack filling where needed, product selection, mix design, water and sand ratios, application rate, weather conditions, curing time, and jobsite quality control.
Manufacturer guidance matters. SealMaster notes that sealcoating success depends heavily on mix design and application methods, and that contractors should follow manufacturer specifications for the products being used.[2]
That is where some low bids become a problem. A contractor can lower the price by using less material, skipping preparation, applying too thin of a coat, ignoring weather conditions, or over-diluting the sealer.
The parking lot may look dark when the job is finished, but it may not have the same protection, film build, or durability as a properly mixed and properly applied sealer system.
Star-Seal of Florida sealcoating guidance explains that most manufacturers require a 20% to 40% water cut, and clarifies that this means adding water to the sealer, not replacing sealer with water.[3]
That matters because water is not the product. Water helps the material apply properly. Too much water can turn a maintenance coating into something that looks acceptable at first but does not perform the way a properly mixed sealer should.
A Good Finish Starts Before the Sealer Is Applied
The best sealer in the world cannot make up for poor preparation.
Before sealcoating, the pavement should be evaluated, cleaned, and repaired as needed. Cracks, potholes, failed areas, oil spots, loose debris, vegetation, and drainage concerns should be addressed before the coating goes down.
StarSeal application guidance makes an important point property owners should understand: sealcoating is a surface protective treatment, not a repair product. Pavement problems should be corrected before sealcoating is applied.[4]
That means a proposal that simply says “sealcoat parking lot” may not tell you enough. You need to know what preparation is included, how repairs are handled, what material will be used, how many coats are included, and when the lot can safely reopen.
Weather and Cure Time Are Part of the Job
Another place low-quality contractors cut corners is scheduling.
Sealcoating has to be applied under the right conditions. The Pavement Coatings Technology Council explains that pavement sealers dry and harden through evaporation and heat from sunlight. Exposure to water before that process is complete can cause delayed curing, discoloration, loss of film integrity, and environmental runoff concerns.[5]
A professional contractor should be watching weather, temperature, shade, humidity, drainage, irrigation, traffic flow, and reopening times. Rushing the job may be convenient. It may also be costly.
Striping, ADA Layout, and Traffic Flow Matter Too
Parking lot striping is not just decoration. It affects traffic flow, parking capacity, accessibility, customer experience, fire lanes, loading zones, pedestrian movement, and the overall impression of the property.
Cheap striping may miss important layout details, use poor-quality paint, apply thin lines, ignore traffic flow, or fail to account for accessible parking spaces, access aisles, signage, and safe routes to the entrance.
The ADA requires businesses, nonprofits, and state and local governments to provide accessible parking spaces where the law applies. That makes parking lot layout and re-striping a compliance issue as well as a curb-appeal issue.[6]
A freshly striped lot should be clean, readable, professional, and functional. It should help drivers understand where to park, where to stop, where to walk, and how to move safely through the property.
Why the Lowest Bid Can Become Expensive
A low-quality parking lot job can create costs that do not show up on the original proposal:
- Premature fading
- Uneven appearance
- Rework
- Customer, tenant, or resident complaints
- Safety concerns
- ADA layout issues
- Potholes returning quickly
- Damage to curbs, sidewalks, landscaping, or vehicles
- Business disruption from having to redo the work
- Difficulty getting the contractor to return after payment
The cheapest job is only cheaper if it actually performs. If the work has to be redone in a few months, the property did not save money. It simply delayed the real cost.
What Property Managers Should Ask Before Hiring a Contractor
Before choosing a parking lot maintenance contractor, ask for more than a price. Ask the questions that reveal what is really included:
- Are you licensed and insured?
- Can you provide insurance certificates?
- What material will be used?
- What mix design will be followed?
- How many coats are included?
- What surface preparation is included?
- Are crack sealing, patching, potholes, or oil spots included?
- What application rate will be used?
- What weather conditions are required?
- How long will the lot need to stay closed?
- Will traffic control, cones, barricades, and scheduling be handled?
- Will the striping layout match the property needs?
- Are ADA spaces, access aisles, and signage being reviewed?
- Can you provide references or examples of similar work?
- What happens if there is a problem after the job?
The Federal Trade Commission also warns property owners to be cautious with contractor red flags such as pressure for an immediate decision, leftover-material offers, cash-only demands, large upfront payments, and promises that are not put in writing.[7]
Those warnings apply beyond residential work. Commercial property owners and managers should be just as careful.
What CasTech Believes
At CasTech, we believe parking lot maintenance should be done with a long-term mindset.
A parking lot is often one of the first things a customer, tenant, resident, employee, inspector, or visitor sees. It affects safety, accessibility, curb appeal, traffic flow, and the value of the property.
We do not believe in winning work by stripping quality out of the job. We believe in clear recommendations, proper preparation, quality materials, professional application, and honest communication about what a property actually needs.
Sometimes that means sealcoating and striping. Sometimes it means crack sealing first. Sometimes it means pothole repair, asphalt patching, ADA updates, signage, wheel stops, speed bumps, or traffic-flow improvements. Sometimes it means telling a property owner that sealcoating alone will not solve the underlying pavement problem.
That is why CasTech offers complimentary parking lot site reviews. We look at the property, identify visible concerns, and help owners and managers understand their options before they spend money.
The Bottom Line
A parking lot maintenance proposal should be judged by more than the final price.
The better question is: What is included, what is being skipped, and how long should the work reasonably last?
A quality contractor should be able to explain the process, materials, preparation, timing, and expected outcome in plain language.
If a bid is dramatically lower than the others, it is worth asking why.
Your parking lot is too important to trust to shortcuts.
CasTech helps commercial properties, HOAs, government agencies, contractors, property managers, and facility managers repair, protect, and maintain parking lots across the Southeast. To request a complimentary parking lot site review, contact CasTech today.
Sources
- Pavement Coatings Technology Council – FAQs – Sealcoating extends the useful life of asphalt parking lots by protecting pavement from sunlight, water, debris, oil, gasoline, and related wear while improving curb appeal.
- SealMaster – Product Technical Data Sheets / Specifications – Sealcoating performance depends heavily on mix design, application methods, and following manufacturer specifications.
- Star-Seal of Florida – Sealcoating & Striping Guidelines, Mix Designs & Coverage Rates – Florida-based guidance explains water, sand, additives, mix design, coverage rates, surface preparation, curing, and application best practices for asphalt sealcoating.
- StarSeal – Sealcoating Basics, Part 2: Application – Guidance emphasizes that pavement must be sound before sealcoating and that sealcoatings are surface protective treatments, not repair products.
- Pavement Coatings Technology Council – Best Management Practices for Sealcoating – Best management practices cover application conditions, curing, protection from water, and environmental precautions during sealcoating.
- ADA.gov – Accessible Parking Spaces – The ADA requires businesses, nonprofits, and state/local governments to provide accessible parking spaces where applicable.
- Federal Trade Commission – How To Avoid a Home Improvement Scam – FTC consumer guidance warns about contractor red flags such as pressure for immediate decisions, cash-only demands, large upfront payments, leftover-material claims, and lack of written agreements.
