What Actually Happens on Sealcoating Day
You have scheduled your sealcoating appointment. The date is confirmed. But if you have never had your driveway sealcoated before, you probably have no idea what to expect when the crew shows up.
Most homeowners are surprised by how systematic the process is. Professional sealcoating is not just pouring black liquid on pavement. It is a multi-step process with specific equipment, timing, and technique that determines whether the result lasts 18 months or 3 full years.
This is a complete walkthrough of what happens from the moment the crew arrives to when you can drive on your driveway again. If you want the science behind why sealcoating works, start with what sealcoating is.
Before the Crew Arrives
Your role in the process begins 1-3 days before the appointment. The surface needs to be clean, dry, and accessible. That means vehicles moved, weeds pulled, oil stains treated, and cracks filled. Our full homeowner prep guide covers every step.
The crew cannot sealcoat around obstacles, over weeds, or on top of standing oil. Prep is not optional — it is the foundation of a lasting sealcoat.
Step 1: Arrival and Inspection (15-30 Minutes)
When the crew arrives, the first thing they do is walk the entire driveway. This is not a formality. The inspection determines exactly how the job will be approached:
Surface condition assessment. The crew checks for cracks, oil stains, low spots, edge deterioration, and any areas where the existing sealcoat (if applicable) has failed. Each issue gets a specific treatment plan.
Moisture check. Even if the forecast is clear, the crew checks for damp spots, especially in shaded areas and against foundation walls. In Oregon, morning dew can linger in shaded zones well past noon in early and late season. Damp spots mean either waiting for them to dry or flagging them for special attention.
Scope confirmation. The crew verifies the square footage, confirms the number of coats, and identifies any areas that need extra work (deep cracks, oil spots, edge repairs). If they find something unexpected — significant damage that sealcoating cannot address — they will tell you before starting rather than coating over a problem.
Step 2: Surface Preparation (30-60 Minutes)
Even if you have prepped your driveway thoroughly, the crew performs their own preparation:
Power blowing. A high-powered leaf blower or backpack blower removes all loose debris, dust, and grit from the surface. Every grain of sand between the sealcoat and the asphalt is a potential adhesion failure point.
Crack treatment. Cracks wider than 1/8 inch are filled with hot-pour or cold-pour crack sealant, depending on width and depth. The filler is applied slightly below the surface level so the sealcoat covers it evenly. For cracks treated during prep, the crew verifies the filler has cured properly.
Oil spot priming. Any remaining oil stains receive an application of oil-spot primer — a specialized product that creates a bondable surface over petroleum-contaminated asphalt. The primer needs 15-30 minutes to set before sealcoat application.
Edge work. The crew defines clean edges along garage doors, walkways, landscaping, and any surface that should not receive sealcoat. This is typically done with masking tape, cardboard, or careful hand-application along borders.
Step 3: Material Preparation
Professional sealcoat is not used straight from the container. The material needs proper preparation:
Mixing. Sealcoat material settles during storage and transport. The crew agitates the material thoroughly using mechanical mixing equipment — either a paddle mixer or the recirculating pump on the spray system. Proper mixing ensures consistent coverage and performance across the entire driveway.
Additives. Depending on conditions and the product being used, the crew may add:
- Sand or aggregate. Fine silica sand mixed into the sealcoat improves traction and durability. This is especially important in Oregon where wet surfaces need extra grip. Aggregate also gives the finished surface a slightly textured feel rather than a slick, glossy finish.
- Latex or polymer additive. Improves flexibility and adhesion. Particularly useful in climates with wide temperature swings.
- Water. Added in small amounts to adjust viscosity for spray application. The ratio is precise — too much water thins the product and reduces durability.
Temperature check. The material itself needs to be at the right temperature for proper application. In cooler Oregon mornings, the crew may need to let the material warm before applying.
Step 4: First Coat Application (30-60 Minutes)
This is where the driveway transforms. There are two primary application methods:
Spray Application
A spray system uses a pressurized pump to atomize the sealcoat material and apply it through a wand or spray bar. The operator controls flow rate and pattern width, walking at a consistent pace to ensure even coverage.
Advantages: Faster coverage, more uniform thickness, better for large or flat surfaces, reaches into cracks and surface texture more effectively.
How it looks: The operator works in overlapping passes, similar to mowing a lawn. Each pass slightly overlaps the previous one to avoid thin spots or visible lines.
Squeegee Application
A squeegee machine or hand-held squeegee pushes the sealcoat material across the surface in thin, even layers. The operator pours material ahead of the squeegee and spreads it with consistent pressure.
Advantages: Better control on small or irregularly shaped driveways, forces material into surface pores and hairline cracks, slightly thicker application per coat.
How it looks: The operator works in sections, pouring and spreading in a systematic pattern from one end of the driveway to the other.
Which Method Is Better?
Neither is universally superior. Spray application is faster and more consistent for large, uniform surfaces. Squeegee application provides better penetration and is more precise around edges and obstacles. Many contractors use a combination — spray for the main field and squeegee for edges and tight areas.
At Cojo, we choose the application method based on the driveway's size, shape, and surface condition. Most residential driveways get spray application with hand-squeegee detail work at edges and transitions.
Step 5: Drying Between Coats (2-4 Hours)
After the first coat, the crew waits for it to dry before applying the second. The first coat needs to be dry to the touch — not tacky, not shiny with wet spots.
Drying time depends on:
- Temperature. Higher temperatures mean faster drying. At 75 degrees F, expect 2-3 hours. At 55 degrees F, it could take 4-6 hours.
- Humidity. Oregon's coastal influence means humidity can slow drying even on sunny days. Below 50 percent humidity is ideal.
- Sun exposure. Direct sun dramatically accelerates drying. Shaded driveways take longer.
- Air movement. A light breeze helps. Still air slows evaporation.
The crew uses this time productively — cleaning equipment, reviewing the first coat for any thin spots or missed areas, and preparing for the second application.
Step 6: Second Coat Application (30-60 Minutes)
The second coat is applied perpendicular to the first coat. If the first coat was applied north-to-south, the second goes east-to-west. This cross-hatch pattern ensures complete, uniform coverage and eliminates any thin lines from the first application.
The second coat is typically the same thickness as the first — approximately 1/32 to 1/16 inch. Together, the two coats create a total film thickness of 1/16 to 1/8 inch, which is the industry standard for residential sealcoating.
Why Two Coats, Not One?
Some contractors offer single-coat sealcoating at a reduced price. Here is why two coats is the standard:
Coverage assurance. Two thin coats guarantee 100 percent coverage. A single coat, no matter how carefully applied, will have thin spots and micro-gaps. Two coats at perpendicular angles eliminate these gaps.
Durability. Two thin coats cure harder and last longer than one thick coat. A single thick coat is more likely to crack, peel, or develop surface imperfections during curing.
Longevity. Two-coat applications typically last 2-3 years. Single-coat applications may show wear within 12-18 months. The incremental cost of the second coat (typically 30-50 percent more than a single coat) pays for itself in extended service life.
Appearance. Two coats produce a richer, more uniform black finish with no visible thin spots or streaks.
Step 7: Barricading and Curing (24-48 Hours)
After the second coat is applied, the crew barricades the driveway to prevent foot and vehicle traffic during curing:
- Caution tape or traffic cones across the driveway entrance
- Wet paint or fresh sealcoat signs visible from the street
- Cardboard walkway from the driveway to the front door if needed
The curing timeline is critical:
| Activity | Minimum Wait Time |
|---|---|
| Foot traffic (walking carefully) | 24 hours |
| Vehicle traffic | 48 hours (72 hours in cooler or humid conditions) |
| Normal use | 72 hours |
In Oregon, we recommend 48-72 hours for vehicle traffic regardless of conditions. The extra caution accounts for overnight dew and the higher humidity levels common in the Willamette Valley and coastal areas.
Step 8: Cleanup and Walkthrough
Before leaving, the crew:
- Removes all masking materials
- Cleans any sealcoat overspray from adjacent surfaces
- Removes equipment and material from the property
- Walks the finished driveway with you (if you are home) to review the result
- Provides curing instructions and a timeline for when you can use the driveway
Equipment Used in Professional Sealcoating
For those curious about the machinery:
- Sealcoat tank or trailer. Stores 100-500 gallons of mixed sealcoat material with mechanical agitation to keep the product consistent.
- Spray system. Pressurized pump with adjustable wand or spray bar, capable of delivering a consistent 0.10-0.15 gallon per square yard.
- Squeegee tools. Rubber-bladed tools in various widths for hand application and edge work.
- Crack sealing equipment. Heated kettle or pour pots for hot-pour filler, caulk guns for cold-pour products.
- Power blower. Commercial backpack or wheeled blower for surface cleaning.
- Mixing equipment. Paddle mixer or recirculating pump for material preparation.
Total Time: What to Expect
For a standard two-car driveway (400-600 square feet) with two coats:
| Phase | Time |
|---|---|
| Inspection | 15-30 minutes |
| Surface prep | 30-60 minutes |
| First coat | 20-40 minutes |
| Drying | 2-4 hours |
| Second coat | 20-40 minutes |
| Cleanup | 15-20 minutes |
| Total on-site | 4-6 hours |
See the Process in Action
Every driveway is different, but the process is consistent. Proper inspection, thorough prep, quality materials, correct application technique, and adequate curing time. Skip any step and the result suffers.
View examples of our sealcoating work on our completed projects page, or contact us to schedule your sealcoating service.