What does sealcoating actually do for my Union City parking lot?

Sealcoating provides a protective layer that shields asphalt from the sun's UV rays (which cause brittleness and fading) and seals the surface against water penetration and oil spills. This extends the pavement's life, improves its appearance, and reduces long-term repair costs.

How long will I need to close my parking lot for sealcoating?

A typical sealcoating project requires the lot to be closed for 24 to 48 hours to allow for proper preparation, application, and curing. Your contractor will provide a precise timeline based on weather and the size of the job.

Can sealcoating fix the cracks in my asphalt?

Sealcoating can fill and seal very small, hairline cracks. However, cracks larger than 1/4 inch must be professionally filled with a hot rubberized crack sealant before the sealcoat is applied. Sealcoating alone is not a crack repair solution.

Is sealcoating necessary if my lot doesn't get much sun?

Yes. While UV protection is a major benefit, sealcoating also provides critical protection against water, gasoline, and oil-all of which can degrade asphalt. Even shaded lots in Union City are exposed to winter rains and vehicle fluids.

What's the difference between sealcoating and pavement resurfacing?

Sealcoating is a preventative maintenance coating applied to the surface of sound asphalt. Resurfacing (or overlay) involves installing a new layer of asphalt (typically 1.5-2 inches thick) over existing pavement to address more significant wear and surface damage.

When is the worst time to schedule sealcoating?

The worst time is during the rainy season (typically late fall through winter) or during periods of cool, damp weather. Applying sealcoat when temperatures are below 50°F or when rain is imminent will prevent proper curing and lead to a failed application.

Should I get my parking lot re-striped at the same time?

Absolutely. Scheduling your line striping immediately after sealcoating is the most efficient and effective approach. The fresh, dark background makes new paint highly visible, and doing both services together minimizes lot closures and ensures a cohesive, professional result.

Top Parking Lot Sealcoating Companies in Union City, CA

Parking lot sealcoating is the essential process of applying a protective coating to asphalt pavement. In Union City, this maintenance is vital for shielding your investment from the intense California sun and seasonal moisture, which can cause asphalt to dry out, crack, and deteriorate prematurely. A fresh sealcoat restores a rich, black appearance, improves safety by sealing minor surface cracks, and extends the lifespan of your pavement. This guide will help you understand the local factors that influence sealcoating and how to evaluate professional services for your property.

Charis Paving Co

San Jose, CA

Charis Paving Co is an asphalt contractor based in San Jose, CA, offering a range of services including asphalt paving, patching, striping, sealcoating, and driveway installation. They serve both residential and commercial clients, using quality materials and advanced techniques to ensure durable and reliable pavement solutions. Their expertise covers parking lot paving and maintenance, with a focus on extending the lifespan and functionality of asphalt surfaces. With years of industry experience, Charis Paving Co emphasizes timely project completion and customer satisfaction.

5.0

47 Reviews

Granite Northwest Grading And Paving

San Jose, CA

Granite Northwest Grading And Paving is a family-owned paving contractor serving San Jose, CA, with three generations of experience. They provide a wide range of services including asphalt and concrete driveway installations, parking lot paving, repairs, sealcoating, resurfacing, and striping. The company handles both residential and commercial projects, focusing on durable, long-lasting pavement solutions. Their expertise includes parking lot paving and maintenance, ensuring smooth, safe surfaces that meet local regulations. Granite Northwest Grading And Paving emphasizes clear communication and a collaborative approach throughout each project.

5.0

38 Reviews

Progressive Asphalt Paving

San Jose, CA

Progressive Asphalt Paving is an asphalt contractor serving San Jose, CA, specializing in asphalt paving, patching, striping, sealcoating, and driveway installation. They provide services for residential, commercial, and municipal clients, using premium materials to ensure durable and long-lasting asphalt surfaces. Their expertise includes asphalt patching techniques that restore pavement strength and professional striping that meets regulatory standards. The company emphasizes tailored solutions and transparent pricing based on years of industry experience.

5.0

29 Reviews

All Things Asphalt Inc

360 Portage Ave, Palo Alto, CA 94306

All Things Asphalt Inc is a locally owned asphalt contractor based in San Jose, CA, offering a full range of asphalt services including paving, patching, striping, sealcoating, and driveway installation. They serve both residential and commercial clients, providing durable and visually appealing asphalt surfaces tailored to the needs of the Palo Alto area. The company uses high-quality materials and advanced equipment to ensure long-lasting results and specializes in parking lot construction and repair with attention to grading and drainage. With years of industry experience, All Things Asphalt Inc focuses on delivering projects on schedule while maintaining quality standards.

5.0

25 Reviews

El Camino General Engineering Inc

1212 Camellia Dr, Palo Alto, CA 94303

El Camino General Engineering Inc is a family-owned asphalt paving contractor based in San Jose, CA. They offer a range of services including parking lot striping, sealcoating, paving, resurfacing, and repair for residential, commercial, and municipal properties. Their team specializes in asphalt installation, maintenance, and ADA compliance improvements, using high-quality materials and equipment to ensure durable results. Founded by Israel, who brings over 30 years of local industry experience, the company also benefits from the civil engineering expertise of his son, Edgar. El Camino General Engineering provides innovative solutions tailored to client needs and operates with a focus on clear communication and project efficiency.

4.8

43 Reviews

See more providers in Union City, CA

Why Sealcoating is Critical in Union City's Climate

The primary threat to asphalt in the Bay Area is prolonged exposure to ultraviolet (UV) radiation from the sun. This UV exposure causes a process called oxidation, which dries out the flexible binders in the asphalt, making it brittle and prone to cracking ¹. Combined with the region's heat, which can soften asphalt, your pavement needs a protective barrier. While Union City enjoys a generally dry, warm climate, winter rains can seep into unprotected cracks and pores, leading to more severe damage like potholes and base failure ². A properly applied sealant acts as a sunscreen and waterproofing agent, directly combating these local environmental stressors.

Determining the Right Sealcoating Schedule

There is no one-size-fits-all schedule for pavement sealing; the frequency depends heavily on usage. For properties with low traffic, such as storage facilities or office parks with minimal turnover, a sealcoat application every 3 to 5 years may be sufficient³ ⁴. For average commercial lots with steady daily traffic, the standard recommendation is every 2 to 3 years ⁵.

High-traffic areas require much more frequent attention. Parking lots for busy retail centers, fast-food drive-thrus, restaurants, and multi-tenant complexes experience accelerated wear from constant vehicle turning, braking, and fluid leaks. For these surfaces, an annual or 18-24 month re-application cycle is often necessary to maintain protection ⁶. It's also crucial to wait 6 to 12 months for new asphalt to fully cure before its first sealcoat application⁷ ⁸.

Summary of Recommended Frequencies:

Low Traffic: Every 3-5 years.
Average Commercial Traffic: Every 2-3 years.
High Traffic/Commercial: Every 1-2 years.

The Sealcoating Process: More Than Just Spraying On Coating

A durable, long-lasting sealcoat job is 90% preparation and 10% application. Skipping proper prep is the most common reason for premature coating failure⁹.

Thorough Cleaning: The entire surface must be free of dirt, debris, and loose gravel. This is typically achieved with mechanical sweepers or blowers, followed by pressure washing to remove ingrained particles.
Oil Stain Treatment: Oil and fluid leaks are common in parking lots and will cause the sealcoat to peel if not addressed. Professionals use specialized degreasers and often apply an oil-spot primer to these areas to ensure the new coating adheres properly.
Crack and Pothole Repair: Sealcoating is a surface treatment; it will not fix structural issues. All cracks wider than 1/4 inch should be cleaned and filled with a hot-applied crack sealant. Any potholes must be fully patched and compacted before the sealing process begins ¹⁰.
Vegetation Removal: Weeds and grass growing through cracks must be removed, as they will continue to grow and break apart the new seal¹¹.

Find the perfect parking lot sealcoating companies for your needs

Get personalized recommendations and expert advice

Timing and Weather: Planning Your Project

Scheduling is a key component of a successful sealcoating project. The product requires specific conditions to cure correctly¹² ¹³.

Ideal Season: The prime window for sealcoating in Union City is from May through September, when temperatures are consistently warm and the chance of rain is lowest.
Temperature & Moisture: Applications should only be done when temperatures are above 50°F and rising. The surface must be completely dry, and there should be no rain forecast for at least 24 hours after application to prevent the liquid sealant from being washed away ¹⁴.
Curing and Striping: After application, the sealcoat needs 24 to 48 hours to cure before it can safely handle vehicle traffic. Re-striping your parking lot lines immediately after the sealcoat cures is highly recommended. This ensures maximum visibility for drivers and pedestrians, enhances ADA compliance, and completes the professional, well-maintained look of your property¹⁵ ¹⁶ ¹⁷.

Understanding Sealcoating Costs in Union City

Costs for professional asphalt sealing vary based on the size, condition, and accessibility of your lot. Prices are typically quoted per square foot.

Small Lots (<10,000 sq ft): For smaller properties, you might expect a price range of roughly $0.15 to $0.35 per square foot. This usually includes basic cleaning, minor crack filling, and the application of one coat of sealant¹⁸.
Large Lots (>50,000 sq ft): Larger, single-level open areas benefit from economies of scale. The cost per square foot often decreases, ranging from $0.10 to $0.25¹⁹ ²⁰.
Additional Cost Factors: The initial quote is for a standard service. Extensive oil spot priming, significant crack sealing, or multiple coats of sealant will increase the overall project cost²¹ ²².

Factor	Recommendation for Union City
Ideal Season	May - September (warm & dry)
Application Frequency	2-3 Years (Average Traffic), 1-2 Years (Heavy Traffic)
Cure Time Before Traffic	24-48 hours
Essential Preparation	Clean, Oil-spot Prime, Crack-fill
Primary Pavement Dangers	UV Rays/Oxidation & Water Infiltration

Frequently asked questions

Sources

Does Sealcoating Work in California - https://www.gpmpavement.com/blog/sealcoat-california/ ↩
Paving Contractors in Modesto, CA | Sidewalk Safety, Inc. - https://sidewalksafetyinc.com/areas-served/modesto-ca/ ↩
How Often Should You Seal Coat Asphalt? - Elcor Construction - https://elcorconstruction.com/how-often-should-you-seal-coat-asphalt/ ↩
How Often Should You Re-Seal Coat Your Pavement - DRYCO - https://www.dryco.com/blog/how-often-should-you-re-seal-coat-your-pavement/ ↩
How Often Should a Parking Lot Be Sealcoated? 510-723-0280 - https://americanasphalt.com/how-often-should-a-parking-lot-be-sealcoated/ ↩
Understanding Asphalt Sealcoating in California | GPM - https://www.gpmpavement.com/blog/understanding-asphalt-sealcoating/ ↩
How Often Should You Sealcoat Your Commercial Parking Lot - https://thepavementgroup.com/commercial-parking-lot-sealcoat/ ↩
How Often Should Parking Lots Be Sealed in Southern California? - https://www.asphaltprofessionals.com/how-often-should-parking-lots-be-sealed-in-southern-california/ ↩
How Often Should You Sealcoat Your Commercial Parking Lot - https://thepavementgroup.com/commercial-parking-lot-sealcoat/ ↩
Parking Lot Sealcoating - What Sealcoating Will Not Fix - https://acplm.net/what-sealcoating-will-not-repair-in-your-parking-lot/ ↩
How to Prepare Your Parking Lot for Sealcoating - https://www.maintainitall.com/how-to-prepare-your-parking-lot-for-sealcoating ↩
How Often Should You Sealcoat a Parking Lot? | Carol Stream - https://jspaving.com/how-often-should-you-sealcoat-a-parking-lot/ ↩
What is the Best Weather for Sealcoating? - ACPLM - (813) 633-0548 - https://acplm.net/best-weather-for-sealcoating/ ↩
How Often Should You Sealcoat Your Parking Lot? - American Asphalt - https://americanasphalt.com/how-often-should-you-sealcoat-your-parking-lot/ ↩
Parking Lot Striping & Maintenance Benefits - Exit 7 Sealcoating - https://exit7sealcoating.com/2024/06/benefits-of-business-parking-lot-striping/ ↩
Parking Lot Sealing And Striping: All You Need to Know - https://www.themonrazcompany.com/parking-lot-sealing-and-striping ↩
Should You Sealcoat Before or After Striping? - 1-800-STRIPER® - https://1800striper.com/sealcoat/ ↩
Step-by-Step Process of Parking Lot Sealcoating - https://asphaltcoatingscompany.com/blog/step-by-step-process-of-parking-lot-sealcoating/ ↩
Sealcoating Asphalt - General Pavement Management - https://www.gpmpavement.com/sealcoating/ ↩
Parking Lot Seal Coating Costs for Asphalt : 2025 Pricing Guide - https://www.fixasphalt.com/blog/how-much-does-it-cost-to-sealcoat-an-asphalt-parking-lot ↩
How to Prepare Your Parking Lot for Sealcoating - Arrow Paving - https://arrowpavinginc.com/blog/prepare-parking-lot-for-sealcoating/ ↩
The Price and Process of Sealcoating a Parking Lot - https://alloutparkinglots.com/price-and-process-of-sealcoating-parking-lot/ ↩

Find the Best Parking Lot Sealcoating Companies for Your Business

Why you can trust Tidy Parking

Select your city

Search providers near you