A driveway resurfaced with coal tar sealer may emit a tar-like odor for months. These sealers contain high levels of volatile organic compounds (VOCs), so chemical masks and protective clothing are required during application.Ĭoal tar sealers are not considered environmentally friendly, and some states and communities have banned their use. Coal tar goes on as a syrupy, black liquid and then forms a tough surface on asphalt known as a “sealcoat.” Application is not a DIY project, as it requires industrial equipment that heats the tar to liquefy it.Ĭoal tar sealers can effectively fill small cracks, seal, and recoat asphalt driveways with a protective coating that lasts up to 4 years. True to their name, they’re made from coal tar, a sticky black substance derived from bituminous coal. These standard sealers have been used on asphalt driveways and streets for decades. There are several types of concrete sealers from which to choose, including coal tar, asphalt-based, plain surface, and fill and seal.
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Expect to pay between $0.25 and $0.65 per square foot for asphalt sealers. Left untreated, these issues can lead to larger problems such as potholes. It’s hard to beat the aesthetic appeal of an asphalt (blacktop) driveway, but the material can develop spider web cracks and low spots over time. Photo: What to Consider when Choosing the Best Asphalt Driveway Sealer
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BEST FOR CRACKED ASPHALT: E-Z Stir Driveway Asphalt Filler/Sealer.BEST BUDGET: MasonryDefender Concrete Sealer De-Icing Protection.
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BEST OVERALL: Foundation Armor Penetrating Water Based Sealer.Read on to learn about the different concrete and asphalt sealers, and find out why the following products are among the best you can buy. The best sealer will vary depending on the individual driveway’s condition and the reason for sealing it. While installing a driveway is a job for the pros, sealing a driveway can be a simple DIY project. Cracked or stained driveways detract from curb appeal, so it makes sense to treat your hardscape-be it concrete or asphalt-with the best driveway sealer to protect the surface from freeze-thaw cycles, chemicals, and harsh UV rays.