Coal tar, used for coating driveways and such, has been exempt from pollution regulations, despite its gnarly (read: carcinogenic) constituents. Application of common sense would surely get this stuff off the market.
The chickens on this material have come home to roost, it seems, because as reported by the Chicago Tribune:
Research shows that the tar steadily wears off and crumbles into contaminated dust that is tracked into houses and washed into lakes.
The makers of coal tar sealants acknowledge that the products contain high levels of benzo(a)pyrene and other toxic chemicals known collectively as polycyclic aromatic hydrocarbons, or PAHs.
If that’s true, how can they even pretend that it’s ok to sell this stuff?