Coal Tar vs. Asphalt Emulsion — What to Choose in 2025
When it’s time to seal your driveway or parking lot, one of the biggest choices is which type of asphalt sealer to use. The two most common options are coal tar and asphalt emulsion—and understanding the difference can save you time, money, and future repairs.
What’s the Difference?
Coal Tar Sealer
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Made from refined coal byproducts
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Long-lasting and highly resistant to oil, gasoline, salt, and water
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Known for a jet-black finish and long durability
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Banned in some areas due to environmental and health concerns (contains PAHs)
Asphalt Emulsion Sealer
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Made from asphalt, water, and emulsifying agents
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More environmentally friendly
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Less odor and safer to apply
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Softer finish and may require more frequent applications
If you're searching for the best asphalt sealer near you, check whether your region allows coal tar products. In some states, it’s banned due to runoff concerns. That’s why asphalt emulsion is now the go-to for many contractors and DIYers.
Which One Should You Use?
Choose Coal Tar If:
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It's allowed in your area
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You want max resistance to chemicals and fuel
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You need a longer-lasting finish
Choose Asphalt Emulsion If:
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You're sealing in a residential or environmentally sensitive area
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You want lower odor and easier cleanup
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You’re okay with resealing every 2–3 years
What Do Pros Use?
Many professionals now use high-performance asphalt emulsion sealers that meet EPA standards while still delivering solid protection. Look for formulations that resist tracking and perform well under traffic.
Need help choosing the right sealer? Asphalt Sealcoating Supply Inc carries both coal tar and asphalt emulsion sealers, plus driveway seal coating equipment, sprayers, and crack fillers. Whether you're a contractor or DIY homeowner, we’ve got the tools to seal with confidence.