Driveway Seal in Construction: Benefits, Process, and Costs
Sealing a driveway is a crucial step in maintaining its durability, appearance, and overall performance. Whether it’s an asphalt or concrete surface, driveway sealing in construction plays a protective role by preventing damage from weather, moisture, chemicals, and wear-and-tear.
This comprehensive guide explains what driveway sealing is, why it’s necessary, the types of sealers used, application processes, and cost breakdowns—perfect for contractors, property owners, and DIYers alike.
What is Driveway Sealing?
Driveway sealing refers to applying a protective coating over an existing driveway surface, typically asphalt or concrete. The sealer acts as a barrier to water, oils, UV rays, and other damaging elements. It also enhances the surface appearance, restoring its color and giving it a fresh, clean look.
Why is Driveway Sealing Important?
Sealing a driveway isn’t just for aesthetics—it’s a preventive maintenance measure that can extend the life of your surface by many years. Key benefits include:
✅ Water Resistance
- Prevents water infiltration, which can cause cracks from freeze-thaw cycles.
✅ UV Protection
- Shields asphalt from oxidization and fading due to sun exposure.
✅ Oil & Chemical Resistance
- Keeps oil spills, gasoline, and salt from penetrating the surface.
✅ Crack Prevention
- Slows the formation of surface cracks by keeping moisture out.
✅ Enhanced Appearance
- Restores faded asphalt to a rich, black finish.
- Concrete sealers add a subtle sheen and reduce discoloration.
✅ Extended Lifespan
- Regular sealing can double the service life of a driveway.
Types of Driveway Sealers
There are various driveway sealing products available, depending on your surface type and desired finish:
1. Asphalt-Based Sealers
Ideal for blacktop/asphalt driveways. They come in the following types:
| Type | Best For | Durability | Appearance |
|---|---|---|---|
| Coal Tar Emulsion | High-traffic areas | 3–5 years | Glossy black finish |
| Asphalt Emulsion | Eco-friendly areas | 2–4 years | Matte black finish |
| Acrylic Sealer | Decorative surfaces | 4–6 years | UV-resistant, rich finish |
2. Concrete Sealers
Used on concrete driveways to repel water and prevent stains.
| Type | Protection Against | Finish |
|---|---|---|
| Penetrating Sealer | Water, salt, mildew | Invisible, matte |
| Acrylic Sealer | UV rays, oil stains | Glossy or satin finish |
| Epoxy/Polyurethane | Heavy-duty protection | High gloss |
Driveway Sealing Process
The sealing process must be done properly for the best results. Here’s a step-by-step overview:
Step 1: Surface Cleaning
- Remove all debris, dirt, oil, and stains.
- Power wash or use degreasers if necessary.
Step 2: Crack & Pothole Repair
- Fill cracks with crack filler.
- Patch potholes before sealing.
Step 3: Sealer Preparation
- Mix thoroughly.
- Pour into a sealcoating applicator or sprayer.
Step 4: Application
- Apply with a squeegee, roller, or sprayer.
- Work in sections to maintain uniform coverage.
- Apply 1–2 coats depending on product type.
Step 5: Curing Time
- Let dry for 24–48 hours.
- Keep cars, people, and pets off until fully cured.
When Should You Seal a Driveway?
Timing matters when it comes to sealing:
- New asphalt: Wait 3–6 months for curing before sealing.
- Spring to early fall: Best time for sealing (temperatures between 50°F–90°F).
- Every 2–4 years: Regular reapplication schedule depending on traffic and climate.
How Much Does Driveway Sealing Cost?
Costs can vary based on surface type, size, labor, and materials.
Asphalt Driveway Sealing Costs
| Driveway Size | DIY Cost | Professional Cost |
|---|---|---|
| Small (200 sq. ft.) | $40 – $80 | $100 – $160 |
| Medium (600 sq. ft.) | $100 – $200 | $250 – $400 |
| Large (1,000 sq. ft.) | $160 – $300 | $400 – $700 |
Concrete Driveway Sealing Costs
- DIY: $0.25 – $0.75 per sq. ft.
- Professional: $1 – $3 per sq. ft.
Additional charges may apply for:
- Crack repairs
- Power washing
- High-performance sealers
DIY vs. Professional Sealing
| Factor | DIY | Professional |
|---|---|---|
| Cost | Lower | Higher |
| Equipment Needed | Squeegee, sprayer, gloves | Commercial-grade tools |
| Skill Level | Moderate | Expert |
| Time Required | 1–2 days | Few hours |
| Result Quality | Varies | Uniform and longer-lasting |
DIY is feasible for smaller driveways, but large or heavily damaged ones benefit from professional work.
Common Mistakes to Avoid
- Sealing too early: Let new asphalt cure.
- Sealing over dirty surfaces: Always clean thoroughly.
- Sealing in bad weather: Rain or cold can ruin curing.
- Overapplication: Too thick can cause peeling.
- Ignoring cracks: They must be filled before sealing.
Conclusion
Driveway sealing is a smart investment that maintains both the function and appearance of your paved surfaces. Whether you’re protecting a newly built asphalt driveway or maintaining an older concrete one, sealing helps guard against damage from moisture, chemicals, UV rays, and daily wear.
By choosing the right sealer, applying it correctly, and maintaining a sealing schedule, you can extend your driveway’s lifespan by years—potentially saving thousands in repairs and replacements down the line.
FAQs
How often should I seal my driveway?
Generally, every 2–4 years depending on traffic, climate, and sealer type.
Can I seal a concrete driveway?
Yes. Concrete sealers (penetrating, acrylic, or epoxy) protect against stains, water, and UV damage.
How long after installation can I seal my new driveway?
- Asphalt: Wait 3–6 months
- Concrete: Wait at least 30 days
What temperature is ideal for sealing?
Between 50°F and 90°F is optimal. Avoid sealing in rainy or freezing conditions.
Is driveway sealing worth the cost?
Yes. It prevents major damage, reduces long-term maintenance, and improves curb appeal.
How long does driveway sealer last?
Typically 2–4 years for asphalt and 3–5 years for concrete, depending on product and use.
Can I seal my driveway myself?
Yes, for smaller jobs. For best results and large driveways, hiring a professional is recommended.
How long does it take for a driveway sealer to dry?
Usually 24–48 hours for foot and vehicle traffic, but it can vary based on weather and sealer type.
