In addition to offering PDC rejuvenator as a sealant for asphalt, Carolina Pavement provides superior coal tar sealants for cost effective applications. The quality of seal coating services, like all pavement maintenance repairs varies greatly among contractors. While other contractors may take short cuts by applying a diluted product and only one coat of material, Carolina Pavement only applies seal coating material that meets or exceeds federal specifications and we always apply two coats of material as recommended by the manufactures. To support this idea we provide a “ready-mix” coal tar product that comes premixed from the distributor. Therefore, we eliminate the error of “adding too much water”.

Asphalt is a very complex mixture of thousands of chemicals which are predominantly open chain (aliphatic) in structure with a considerable degree of un-saturation within their molecular structure. The open chain provides easy access to weather, salts, and chemicals to attack and disintegrate the asphaltic molecules that promote binding and waterproofing.

The first visual sign of deterioration is a progressive change in the color of asphalt pavement from rich black to brown to gray. Furthermore, asphalt, being a byproduct of the petroleum distillation process, is easily dissolved by other products that also are derived from petroleum, such as oils, fats, grease, mineral spirits etc. It is only through the petroleum refining process that they are separated for various uses. Because these individual products come from the same source, they try to join together when put in contact with each other. So when automotive oil or gasoline — both petroleum distillates — leak onto an asphalt pavement, they will work to easily dissolve the similar chemicals in asphalt. These problems are associated primarily with off-street pavements such as parking lots, low traffic streets, airport aprons or runways, service stations, and driveways.

Roads, having the advantage of continuously rolling traffic, do not need protection because the rolling action of the traffic steadily brings the lower layers, rich in asphalt, to the surface and "kneads" the oxidized surface layers back into the pavement. Eventually all the asphalt binder is exhausted and the aggregates begin to unravel due to the absence of the binding cement. The rate of pavement deterioration depends upon the traffic volume as well as climatic conditions. Once the deterioration process begins, surfaces develop minor cracks which widen and deepen with time. If the cracks are not repaired at this stage, water seeps into the base courses and damages the pavement’s load bearing capacity. It is evidenced by rutting, shifting, and serious alligatoring. The surface layers of off-road pavements are under continuous attack from the weather and other destructive elements. The pavement damage will continue if proper protective actions such as seal coating are not taken.

Carolina Pavement Seal Coating Features

• Aesthetically pleasing upon completion
• Inexpensive initial placement
• Limited “downtime” (can typically reopen to traffic in as little as 24 hours)
• Smooth coating surface fills in minor roughness
• Provides new wear surface
• Temporarily suspends oxidation, the aging process of asphalt