Studies Raise Questions about Pavement Sealers (2 page pdf, Environ Health Perspect. 2012 May 1, 2012)
Also discussed here: Public Health Statement – Polycyclic Aromatic Hydrocarbons (Pahs) (6 Page Pdf, Department Of Health And Human Services, Public Health Service Agency For Toxic Substances And Disease Registry, Center For Disease Control, Aug. 1995)
And here: A review of airborne polycyclic aromatic hydrocarbons (PAHs) and their human health effects (Abstract, Ki-Hyun Kim, Shamin Ara Jahan, Ehsanul Kabir, Richard J.C. Brown, Atmospheric Environment, Oct. 2013)
Today we review a short article that discusses the pros and cons of applying a sealant to driveways. The biggest pro is improving the cosmetic appearance of the driveway. The biggest con is that coal-tar based sealants act as source of polycyclic aromatic hydrocarbons (PAHs) for as long as eight years after the initial application, in addition to producing14.5 times higher concentration of PAH-contaminated indoor dust in residences located next to treated pavements. An asphalt pavement structure should last virtually forever if a thin coat of repaving is applied after 20 years along with interim crack sealing. The health impacts from exposure to PAH for long periods include a higher risk of cancer as well as cataracts, kidney and liver damage and jaundice.
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