Get matched with top asphalt driveway pros in Richland County, MT

There’s no single best asphalt grade—it all comes down to where and how it’s used. Highways and heavy-traffic roads need something tough, like polymer-modified asphalt (PMA) or Stone Matrix Asphalt (SMA). Local roads and parking lots rely on the Performance Graded (PG) system, chosen based on climate. A PG 64-28 mix, for example, handles a broad temperature range while simpler, more cost-effective mixes are typically enough for residential driveways. The best grade of asphalt depends on traffic, weather, and your budget, which is why a professional’s input is always a smart move before making a decision.

Asphalt dries and cures best between 50 and 85 degrees Fahrenheit. This range allows moisture to evaporate quickly without causing the asphalt to cool too fast, which can negatively affect the drying process. However, keep in mind that other weather conditions can also affect curing and drying times, such as precipitation and humidity.

On average, asphalt dries within 24 to 72 hours, meaning it’s solid enough for light traffic—walking and careful driving. Full curing—when asphalt reaches peak strength—can take anywhere from three months to a year. During that time, heavy loads and sharp objects can leave marks. Weather, asphalt mix, and thickness all affect how quickly it dries and cures. If you want your asphalt to last, treat it gently until it’s fully cured. For the best results, check with a professional asphalt contractor for their advice.

Many asphalt companies have experience with tar and chip paving, but not all. The process is unique enough—and not incredibly common enough—that you may have to look around for a tar and chip specialist. However, speaking with a driveway company is a great place to start, especially if they have experience with multiple materials.