Coal-tar oil sealant has been popular in sealing driveways and roads since its inception many decades ago. There are some controversies regarding the environmental impacts of these sealants and their impact on human health. As a result, a lot of thought and planning must go into making the choice between coal-tar oil sealants and asphalt emulsions.
Benefits of Coal-Tar Oil Sealants
Compared to other sealants on the market, coal-tar oil products have several advantages to offer. These sealants are long lasting in comparison to asphalt sealants. Coal-tar oil sealants will give you a few extra years of use. You do not have to worry about resealing your driveway for a long time, once you have applied a high grade coal tar-oil sealant, it will provide a solid finish over the asphalt surface.
Another important benefit is color conservation. With asphalt sealants, you can expect some degree of fading over the years. Coal-tar oil, on the other hand, has superior sun blocking properties that protect your driveway from fading. These sealants also effectively block ultraviolet rays that can hasten the damage to the driveway. Ultraviolet rays and harsh sunlight can also contribute to the formation to cracks that gradually widen and let in ice, snow and water. All these factors degrade the driveway much faster. This type of sealant is also much more resistant to moisture.
Driveways and roads are exposed to gasoline and oil from vehicles. With asphalt sealants, the danger is that these substances act as solvents that wear off the sealant coating. Coal-tar oil sealants have a high degree of resistance to gasoline, brake fluids and oil that may be emitted from vehicles. This is another factor that contributes to the popularity of coal-tar oil sealants, which are also more affordable than other sealants.
Disadvantages of Coal-Tar Oil Sealants
Coal-tar oil sealants are primarily composed of a by-product of coal. These sealants are not considered environment-friendly. They emit high levels of Volatile Organic Compounds (VOCs), which contribute to the intense odor and fumes they emanate. High VOCs are unhealthy and can cause long-term health risks in addition to breathing problems and other illnesses. Coal-tar oil sealants can contribute to the thinning of the ozone layer and release chemicals into the environment. In addition, they are thought to contribute to the formation of toxic particles in house dust. These toxins have been related to growth defects and cancer in people.
Extreme care must be taken during the application of coal-tar oil sealant. This is because these products are skin irritants and can cause scalds or rashes if they come in contact with the skin. Proper protection must also be used for the eyes and nose, to prevent contact and to prevent fume inhalation. Asphalt sealants are, in comparison, much safer to handle and apply.
Though coal-tar oil sealants have some substantial advantages, manufacturers are now coming up with asphalt sealants that have better durability and resistance to moisture, sunlight and chemicals. This is made possible with the addition of polymers in asphalt sealant. As a result, many buyers are now switching over to safer options that provide good results, even though the cost may be higher.