The Study Parameters

The study followed twenty-one workers on crews from three separate companies using coal tar sealers. The participants had different levels of protection from Tyvek to none at all to wearing the same clothes during the week. They studied skin exposure, air concentrations and urine concentrations of various coal tar chemicals. Urine was tested before and after each shift. Chemicals from coal tar sealers called polycyclic aromatic hydrocarbons (PAHs) can enter the body through the skin, breathing it in or eating with residue on the hands. Many of these PAHs can be measured in urine tests.

The Results of the Study

What did the researchers find out about coal tar sealers and chemicals? Here’s a quick synopsis:

• Coal tar chemicals were found in ALL workers in the crew and were ALWAYS higher after a shift than before.
• By the end of each work week, 9 out of 10 shift-end samples “greatly” exceeded the level where the workers should expect negative health effects and “genotoxicity” (gene mutations caused by exposure to toxins).
• Four of the PAH chemicals found in the urine samples don’t even have individual safe levels of exposure data “because they have been observed to be carcinogenic in animal studies.”
• Urinary levels of one of the PAH chemicals was over 300 times higher than is observed in the general population.
• The exposure levels observed were “substantially” greater than what has been seen with asphalt workers previously.
• Hose men or applicators had higher concentrations of airborne PAH and skin exposure than non-applicators.
• The exposure could not be explained by any other nearby chemical source.

While considering these results, also consider that children are 30 TIMES more susceptible to the dangers of coal tar and other high PAH sealers than adults. Also consider that the exposure routes included breathing in the chemicals as well as skin contact and residue on the hands when eating (ingestion).

The study did not address whether personal protection equipment or PPE would be sufficient to protect workers. The most effective way to address carcinogenic chemicals in the workplace (even if the workplace is outside) is elimination of those chemicals. There IS a way to completely eliminate exposure to coal tar and coal tar toxins. It’s called Pitch Black Asphalt Emulsion and it contains 0.00% of the harmful PAHs found in coal tar products. It’s safe and environmentally friendly. This study makes it clear that coal tar is a serious danger not only for workers but for others near work sites that could be exposed by proximity. Finally, we have a study from the federal government showing the true dangers of coal tar products and sealers. The time to move to a cleaner and greener solution is now!

Note: A copy of this 32-page study can be purchased at https://www.sciencedirect.com/science/article/abs/pii/S1438463922000542?via%3Dihub

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Dangers of Coal Tar Sealant

1. Carcinogenic Compounds

Coal tar sealants contain polycyclic aromatic hydrocarbons (PAHs) are known to be carcinogenic because they cause damage to DNA. Prolonged exposure can pose health risks, especially in areas with heavy traffic or frequent footfall. Common cancers associated with PAHs include skin cancer, lung cancer, bladder cancer, breast cancer and prostate cancer.

2. Airborne Particles

During application and as the sealant deteriorates over time, fine particles become airborne. Inhaling these particles can lead to respiratory issues and pose a threat to the respiratory health of individuals in the vicinity.

3. Water Contamination

Runoff from surfaces treated with coal tar sealants can contaminate nearby water bodies. The leaching of harmful chemicals into water poses risks to aquatic life and compromises water quality.

4. Soil Contamination

PAHs from coal tar sealants can seep into the soil, affecting the health of plants and the overall ecosystem. This contamination disrupts the natural balance and can have long-term consequences for vegetation.

5. Hazardous to Wildlife

Wildlife, particularly aquatic organisms, can be adversely affected by the runoff from coal tar sealants. The toxic components can accumulate in aquatic environments, leading to harmful effects on fish and other wildlife.

6. Impact on Human Health

Besides cancer risks, coal tar sealants contribute to respiratory problems, skin irritation and other health issues. Those with pre-existing conditions can be more vulnerable to these adverse effects.

7. Long-lasting Environmental Impact

Coal tar sealants persist in the environment, contributing to long-lasting pollution. The slow degradation of these sealants amplifies their negative impact on both urban and natural landscapes.

It’s time to make a change for the better. EcoShield Asphalt Products offers a solution for the Carolinas and Virginia with Pitch Black Asphalt Emulsion Sealcoat – a coal tar-free alternative that prioritizes safety and quality. Say goodbye to the dangers associated with coal tar sealants and make the switch to Pitch Black. Choose a sealcoat product that not only protects your surfaces but also cares for the well-being of the environment and those around you. Make the right choice, make the eco-friendly choice – switch to Pitch Black Carolinas today!

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