Black sealcoat contrasts with unsealcoated asphalt on parking lot
By Water Resources Mission Area
June 2004 (approx.)
Detailed Description
Sealcoat, marketed to protect and beautify the underlying asphalt, sharply contrasts here with the light gray of unsealcoated asphalt pavement. Read more about coal-tar-based sealcoat and PAHs here.
Sources/Usage
Public Domain.