Paving repair is an important component of parking lot annual maintenance that will result in longer asphalt life and lower replacement cost. Sealcoating is a significant ingredient in a paving repair program.
Sealcoating protects and prolongs the life of any parking lot by filling surface holes which reduces exposure to ultraviolet rays, oxygen and the depth to which gas or oil can penetrate the pavement. Over time, the surface oxidizes and becomes faded in appearance. Fresh sealcoat paving repair adds new life to pavement in appearance and use.
There are two methods to apply sealcoat: either spray or squeegee. However, before pavement sealing can begin, the surface must be free of all dirt and debris, cracks need to be filled, potholes repaired, and oil spots must be cleaned or primed to ensure better adhesion to the surface. The air and pavement temperature should be ideally at least 55 degrees Fahrenheit during application and for 8 hours afterward. It is best to keep traffic off a newly sealed surface for 18-36 hours to allow for proper drying and cooling time.
The price of asphalt will always be affected by crude oil prices, which fluctuate when supplies vary. Sealcoating preserves asphalt for pennies per square foot.
Sealcoats generally consist of a mixture of emulsified asphalt, water, mineral fillers, and various other admixtures. Sealcoats are applied directly to the surface of an asphalt pavement. They can be applied by rubber squeegee, broom, or mechanical spray.
Sealcoats serve to seal the top of the asphalt, preventing water from penetrating the surface of the pavement and protecting the top layer of asphalt from oxidation and wear caused by exposure to the sun and air. Sealcoats also beautify the pavement by providing a smooth, black, even surface ideal for painting lines and sweeping.
Sealcoats are designed for off highway use where there are low traffic speeds and tight turning radiuses such as parking lots, mobile home parks, schools, shoulders, etc.