Best Asphalt Driveway Sealer: Emulsion, Coal Tar or Acrylic

Most blacktop sealers look identical in the pail: thick, black, and promising years of protection. The difference that matters is the base chemistry, because it decides how long the coating lasts, how it handles gasoline drips, how fast you can drive on it, and whether it is even legal where you live. A top rated driveway sealer for a sunny, lightly used driveway in the South is not necessarily the right choice for a northern driveway that sees snowplows, road salt, and a leaky pickup truck.

There are three main families: asphalt emulsion, refined coal tar, and acrylic or polymer-modified sealers. Within each family, you will find budget, mid-grade, and premium formulas that differ mostly in solids content, filler, and additives. This guide compares them side by side, covers coverage per 5-gallon pail and cure times, and explains how to pick a product that fits your climate and budget. If you are ready to apply, the separate how-to-seal-a-driveway method is a different job; this guide is about choosing what goes in the pail.

What Makes a Top Rated Driveway Sealer?

Star ratings on store websites mostly reflect how easy a product was to apply and how it looked the first week. Long-term performance depends on a few measurable features that are listed on the label or technical data sheet.

• Solids content: Higher solids mean a thicker film per coat and longer life. Budget sealers are often thin and wear through within a season.
• Filler: Sand or mineral filler adds traction and texture, and helps fill minor surface voids. Some “filler sealer” formulas are designed to hide hairline cracks and surface raveling.
• Polymer additives: Latex or other polymers improve flexibility, adhesion, and resistance to scuffing from tire turns.
• Stated life: Manufacturers typically claim anywhere from one to five years. Take these as relative comparisons rather than guarantees.
• Weather window: Most need temperatures above about 50°F for 24 hours and no rain for 24 to 48 hours.

A top rated driveway sealer earns that label by scoring well on all of these, not just one. The best rated asphalt sealer for you balances these factors against price per square foot rather than price per pail.

Asphalt Emulsion Sealers

An asphalt emulsion driveway sealer is asphalt cement suspended in water with clay or other emulsifiers. It is the most common type on store shelves and the default choice for many homeowners. Because the base is the same material as the driveway itself, it bonds well and flexes with the pavement.

Emulsions have a low odor, clean up with water while wet, and are allowed everywhere. Their weakness is fuel and oil resistance: gasoline and motor oil dissolve asphalt, so spots under a leaking vehicle will soften. Color also fades from deep black to charcoal faster than coal tar, especially in full sun. Premium polymer-modified emulsions narrow that gap and are often considered the best blacktop driveway sealer for homeowners in areas where coal tar is restricted.

Typical coverage is roughly 250 to 400 square feet per 5-gallon pail per coat, depending on how porous the surface is. Expect to walk on it in several hours and drive on it after 24 to 48 hours.

Refined Coal Tar Sealers

A coal tar asphalt sealer, more accurately called a refined coal tar sealer, is made from a byproduct of steel coking. It has historically been the professional favorite for parking lots because it resists gasoline, oil, and ultraviolet light better than asphalt emulsions, and it keeps a rich black color longer.

The trade-off is health and environmental concern. Coal tar contains high levels of polycyclic aromatic hydrocarbons (PAHs), which can wear off as dust and wash into waterways. Several states and many cities and counties restrict or ban coal tar pavement sealers, and some retailers have stopped selling them. Check local rules before buying. Coal tar also has a strong odor and can irritate skin, so gloves, long sleeves, and eye protection are important during application.

Coverage and cure times are similar to emulsions, though coal tar can be more sensitive to application temperature. Where it is legal, it remains an option for driveways with heavy vehicle traffic and frequent fuel drips.

Acrylic and Polymer Sealers

Acrylic sealers use synthetic polymers instead of asphalt or coal tar. They are usually the most expensive per pail but can offer the longest service life, excellent UV resistance, and good resistance to fuel and oil. Many dry faster than asphalt-based products, which is useful when you need the driveway back quickly.

Acrylics are also low-odor and generally have fewer environmental restrictions than coal tar. Some are available in colors other than black, which matters for decorative or tinted pavement. Coverage varies widely by product, from about 200 to more than 400 square feet per 5 gallons, so compare the label figure against your driveway’s square footage before buying.

Side-by-Side Comparison

How Much Sealer You Need

Measure the driveway’s length and width and multiply for square footage. A typical two-car driveway 20 feet wide by 40 feet long is 800 square feet. At 300 square feet per pail per coat, two coats need roughly five or six pails. Older, rough, or oxidized driveways soak up more product, so buy an extra pail and return it unopened if possible.

Homeowners with long rural driveways sometimes look at bulk driveway sealer sold in 55-gallon drums or delivered in larger quantities. Bulk pricing is lower per gallon, but you need a way to mix and move it, and the product must be used before it separates or freezes. For most suburban driveways, 5-gallon pails are more practical.

Choosing the Right Sealer for Your Driveway

1. Check local rules. If coal tar is restricted where you live, the choice is between emulsion and acrylic.
2. Assess condition. Fill cracks wider than about 1/4 inch with a dedicated crack filler first. An asphalt filler sealer can smooth minor surface wear but will not fix real cracks.
3. Consider traffic and leaks. Heavy vehicles, frequent turning, or dripping cars favor polymer-modified emulsion, acrylic, or coal tar where allowed.
4. Match your climate. Hot, sunny regions benefit from UV-resistant formulas. Cold climates need flexibility to handle freeze-thaw cycles and plowing.
5. Compare cost per square foot. Divide the pail price by its rated coverage per coat to compare products fairly.

For most homeowners, a premium polymer-modified asphalt emulsion is the best asphalt driveway sealer overall and the most practical top rated driveway sealer to shop for: it is widely available, legal everywhere, and lasts noticeably longer than bargain pails. Apply with a driveway sealer squeegee for thin, even coats; a squeegee pushes material into surface pores better than a brush and helps avoid puddles that stay tacky.

Application Safety and Weather Tips

Asphalt-based and coal tar sealers can irritate skin and eyes. Wear chemical-resistant gloves, safety glasses, long sleeves, and old shoes. Work in open air, follow the label for respirator recommendations, and keep solvent-based products away from open flames and pilot lights in an attached garage. Never mix different sealer types or thin a sealer with anything other than what the label allows. Keep children and pets off the driveway until it has fully cured, and store leftover pails sealed and away from freezing temperatures.

Plan for a dry forecast, air and pavement temperatures above about 50°F, and no chance of rain for at least a day. Sealing too often is also a mistake: a fresh coat every two to three years is typical, and heavy buildup can crack and peel.

Troubleshooting Common Sealer Problems

• Tacky spots days later: Coat applied too thick or in cool, humid weather. Give it more drying time and apply thinner coats next time.
• Gray streaks: Material was not mixed thoroughly, leaving filler unevenly spread. Stir every pail completely.
• Peeling: Too many layers built up or sealer applied over dirt and oil. Clean well and seal less frequently.
• Tire marks: Driving too soon or turning wheels while stationary. Wait the full cure time.

Cost Ranges and When to Call a Pro

Price does not always track quality, and a top rated driveway sealer in one region may be a mid-priced pail. Basic asphalt emulsion pails are the least expensive, premium polymer blends cost more, and acrylics are at the top of the range. DIY sealing of an average driveway usually lands in the low to mid hundreds of dollars for materials and tools. Professional sealcoating typically costs a modest amount per square foot and often includes crack filling and power-cleaning.

Call a paving contractor if the surface has widespread alligator cracking, potholes, drainage problems, or soft spots. Those are base failures that no sealer, including the best asphalt sealcoating product, can fix. A pro can also spray commercial-grade materials that are not sold at retail.