Quick Answer: The best time to sealcoat in Southern Illinois is May through September when temperatures consistently stay above 50°F. Sealcoat every 2-3 years for optimal protection.
Best Season for Sealcoating in Southern Illinois
Ideal Months: May - September
Sealcoating requires specific weather conditions to cure properly:
- Air temperature: Above 50°F
- Pavement temperature: Above 50°F
- No rain: 24-48 hours before and after
- Low humidity: Helps faster curing
Month-by-Month Breakdown
| Month | Rating | Notes |
|---|---|---|
| January-March | Not Recommended | Too cold |
| April | Possible | Watch overnight temps |
| May-June | Excellent | Ideal conditions |
| July-August | Good | Can be very hot |
| September | Excellent | Ideal conditions |
| October | Possible | Early month only |
| November-December | Not Recommended | Too cold |
How Often to Sealcoat
The general rule is every 2-3 years, but several factors affect this:
Sealcoat Every 2 Years If:
- High traffic volume
- Driveway gets full sun exposure
- You want maximum protection
- Previous sealcoat is visibly worn
Sealcoat Every 3 Years If:
- Light residential use
- Shaded areas
- Previous sealcoat still looks good
- Budget is a concern
Signs Your Driveway Needs Sealcoating
- Gray color: Asphalt turns gray as it oxidizes
- Visible aggregate: Small stones showing through
- Small cracks forming: Early-stage cracking
- Rough texture: Surface feels gritty
- Water absorption: Water soaks in instead of beading
When NOT to Sealcoat
New Asphalt
Wait at least 90 days after new asphalt installation. New asphalt needs time for oils to evaporate and the surface to cure.
Recently Sealcoated
Don't over-sealcoat. Too many layers can cause peeling and cracking. If your last sealcoat still looks good, wait another year.
Severely Damaged Asphalt
Sealcoating won't fix major problems like alligator cracking, large potholes, or base failure. These need repair or replacement first.
Frequently Asked Questions
What month is best to seal a driveway?
In Southern Illinois, May through September offers the best conditions for sealcoating. Late spring (May-June) and early fall (September) are ideal as temperatures are warm but not extreme.
How often should you sealcoat an asphalt driveway?
Sealcoat your asphalt driveway every 2-3 years for optimal protection. High-traffic driveways may need it every 2 years, while low-traffic driveways can go 3 years between applications.
What temperature is too cold for sealcoating?
Sealcoating requires temperatures of at least 50°F (10°C) for proper curing. Both air and pavement temperatures must be above this threshold, and temperatures shouldn't drop below 50°F for 24-48 hours after application.
Schedule Your Sealcoating
Ready to protect your driveway? Contact Pinpoint Parking to schedule your sealcoating service. We'll help you pick the right time for optimal results.