Reasons for Sealing
First you need to understand what asphalt is made up of. Granite stones, sand, and tar are the 3 main products in asphalt. The tar in asphalt is like the glue that holds the sand and stones together. When the tar is exposed to the sun, it oxidizes and becomes hard and brittle and the asphalt is more prone to cracking. A sealed driveway stays cleaner and ice doesn’t bond to the surface as much because the pores are sealed. It is also resistant to petroleum spills. A sealed driveway looks much nicer than a gray oxidized one.
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