Q:

What are the most effective types of driveway sealers for asphalt?

A:

Quick Answer

Coal tar emulsion driveway sealers generally work best on asphalt, delivering up to five years of protection against UV rays, water and petroleum-based products. However, many home and business owners choose asphalt emulsion driveway sealer due to the relative scarcity of coal tar emulsions and their more expensive price tags.

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Full Answer

While asphalt emulsion driveway sealers generally last two to three years, they often fail to protect against UV radiation and degrade quickly when exposed to petroleum-based products. The upside of asphalt emulsion comes from its dark black color, which restores the original look of the asphalt, while higher-quality coal tar emulsion products tend toward turning the asphalt gray. For this reason, many choose to mix the two types of driveway sealers to ensure a better look while retaining many of the protective advantages of coal tar emulsion driveway sealers.

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