At Baker Asphalt Inc. & Sealcoating, we get asked all the time—“Can I seal my asphalt millings to make them last longer?” It’s a common question, especially in rural areas like Armada, Romeo, Ray Township, and Memphis, where recycled asphalt (also called asphalt millings) is a popular, budget-friendly choice.
The short answer: sealing asphalt millings usually does more harm than good.
Here’s what you need to know before you try to seal millings—and why it’s not recommended by professionals.
What Are Asphalt Millings, Anyway?
Asphalt millings are the ground-up material from old asphalt roads and driveways. They’re commonly used as a lower-cost alternative to traditional hot mix asphalt, especially for long driveways, parking areas, or farm roads. When properly spread and compacted, millings can form a hard, semi-permanent surface.
But here’s the catch—they’re not the same as fresh, hot asphalt, and they don’t behave the same way.
The Myth of Sealing Asphalt Millings
Some people try to “seal” their recycled asphalt by spraying it with diesel fuel, sealcoat, or other liquid products in an attempt to lock it in or create a smoother finish.
This usually doesn’t go the way they expect.
Here’s what actually happens:
- 🔸 Diesel fuel is illegal to use as a binder and harmful to the environment. It can contaminate soil and groundwater and lead to fines or code violations.
- 🔸 Sealcoat isn’t made for millings. It won’t bond properly, and can leave a sticky mess or flake off as the millings shift underneath.
- 🔸 Some products might temporarily harden the surface, but this doesn’t last—and can lead to uneven surfaces or faster deterioration.
What You Should Do Instead
The best way to finish asphalt millings is through proper compaction, not sealing. When millings are spread evenly, graded correctly, and compacted with a roller, they can form a solid surface that holds up well for light-to-moderate traffic.
Over time—and especially with use—they naturally bind together, creating a firm and stable base. In many cases, that’s all you need.
If you want to take it a step further, a light layer of fresh hot asphalt can be applied over the top of compacted millings to lock it in and provide a clean finish—without the issues caused by improper sealing.
So, Should You Seal Millings?
In short—no.
If you’re using asphalt millings, sealing them with any product isn’t going to give you better results. In fact, it can backfire, costing you more time and money in the long run.
Need Help with Asphalt Millings in Armada or Nearby?
At Baker Asphalt Inc. & Sealcoating, we’ve helped homeowners and businesses across Macomb and St. Clair counties get the most out of their asphalt projects. Whether it’s a fresh hot mix driveway or professionally compacted millings, we’ll help you choose the right solution.
Serving Armada, Romeo, Richmond, New Haven, and beyond.
Give us a call for an honest opinion and a free quote.
