Nihal Pandrapragada
Research and Development Chemist
STAR Inc.
Asphalt pavements, from bustling highways to quiet driveways, are a predominant part of modern infrastructure. While their robust appearance suggests invincibility, asphalt is, in fact, a vulnerable material susceptible to the relentless assault of water, sun, ice, de-icing salts, petrochemicals and traffic. This is where sealcoatings, the unsung heroes of pavement preservation, step in. By providing a protective layer, sealcoatings significantly extend the lifespan of asphalt, offering both environmental and economic benefits.
What are Sealcoatings?
Sealcoatings are protective layers applied to asphalt pavements. Essentially, they form a barrier over the asphalt surface, shielding it from the elements and everyday wear and tear. This barrier helps to prevent the oxidation of the asphalt binder, which is the glue that holds the aggregate (stones and sand) together. Without this protection, the binder becomes brittle, leading to cracking, raveling (loose aggregate), and eventually, full-scale pavement deterioration.