Asphalt pavement is a popular choice for driveways, parking lots, and roads due to its durability and longevity. To protect and preserve asphalt pavement, sealers are commonly used. However, coal tar sealer, which was once the go-to option, is being gradually replaced due to health and environmental concerns. In this article, we will explore the reasons behind the shift, the alternatives to coal tar sealer, the advantages and disadvantages of using asphalt emulsion as a sealer, considerations when switching to asphalt emulsion, and safe storage practices.
Why is Coal Tar Sealer Being Gradually Replaced?
Coal tar sealer contains toxic chemicals, such as polycyclic aromatic hydrocarbons (PAHs), which can leach into the soil and water, posing a risk to human health and the environment. Additionally, the production and application of coal tar sealer release volatile organic compounds (VOCs) into the air, contributing to air pollution and respiratory issues. These health and environmental concerns have led to the phasing out of coal tar sealer in many jurisdictions, prompting the search for safer alternatives.
What are the Alternatives to Coal Tar Sealer?
Asphalt emulsion sealer has emerged as a safer and more environmentally-friendly alternative to coal tar sealer. Asphalt emulsion sealer is made from asphalt, water, and an emulsifying agent, and does not contain harmful chemicals or VOCs. Other alternatives include acrylic-based sealers, which are water-based and do not contain coal tar or harmful chemicals, and polymer-modified sealers, which are made with polymers for increased durability.
What are the Advantages of Using Asphalt Emulsion as a Sealer?
One of the main advantages of using asphalt emulsion sealer is its safety. It does not contain toxic chemicals or VOCs, making it a safer option for human health and the environment. Asphalt emulsion sealer is also more resistant to weathering and fading, providing long-lasting protection for asphalt pavement. It is easy to apply, dries quickly, and does not emit strong odors, making it convenient for use in various weather conditions and settings.
What are the Disadvantages of Using Asphalt Emulsion Sealer?
One potential disadvantage of using asphalt emulsion sealer is that it may not be as resistant to oil and gasoline spills as coal tar sealer. However, this can be mitigated by applying an additional layer of protection, such as a sealant or barrier coat. Another consideration is that asphalt emulsion sealer may be slightly more expensive than coal tar sealer or other alternatives, although the benefits of its safety and durability may outweigh the higher cost.
What Should I Consider When Switching to Asphalt Emulsion Sealer?
When switching to asphalt emulsion sealer, there are a few factors to consider. First, it is essential to properly clean and prepare the pavement surface before applying the sealer to ensure proper adhesion. This may involve removing dirt, debris, and existing sealers. Following the manufacturer’s instructions for application and drying time is also crucial to achieve optimal results. Additionally, considering the local weather conditions and temperature during application is important to ensure proper curing and performance of the sealer.
How Can Asphalt Emulsion Sealer Be Safely Stored?
Asphalt emulsion sealer should be stored in a cool, dry place, away from direct sunlight and heat sources. It should be kept in a sealed container to prevent evaporation or contamination. When transporting the sealer, it should be securely fastened and protected from spills or leaks to avoid environmental damage.
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Conclusion
Asphalt emulsion sealer has emerged as a safer and more environmentally-friendly alternative to coal tar sealer for protecting and preserving.
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