How does sealcoating work?
It is like sun block. We know that asphalt is a mixture of aggregate (small stones) and mineral fillers (sand) combined with 4.5% to 12% (average 6%) asphaltic binder (asphalt cement). It is this binder that needs to be protected from deterioration. This binder is highly subject to problems with ultraviolet rays, moisture and traffic overload. By placing a sealcoat over the asphalt you are placing a protective barrier over the asphalt. This process of applying a sealcoat every 3-6 years will double the life of your asphalt, saving you from having to carry out costly repairs.
