Use sealant filling and sewing process to replace the traditional asphalt filling and sewing process, treatment of asphalt pavement cracks, is a great improvement of the highway maintenance technology. The traditional process by cold brittleness at low temperature and high temperature of asphalt material softening features such as limit, repairing the cracks will be along with the change of temperature after a year of surface increases and the craze again. The existence of the problem, aggravating the pavement maintenance maintenance workload and the cost of materials. And sealant filled seaming work roads in use process, by the large traffic volume, overload, soaking in the natural weather rain and snow, freezing and thawing, and the causes of heat bilges cold shrink, etc, all can cause massive damage to local or road, municipal construction laid pipeline damage to road excavation, are affect the service life of the road, traffic safety and amenity.Usually, road maintenance departments use hot mix asphalt mixture pavement for repair, but due to the hot material repair by weather, temperature, pit slot size, quantity, damage degree, the influence of such factors as the pit slot in particular winter pit slot, at any time can not be timely repair, will certainly to cause damage, not only waste of repair materials, and even affect the traffic safety and reduce the service life of the road.BEST cold material with its can repair the road under all-weather conditions, simple operation and repair of good quality and stored for a long time, save money, and many other advantages, is increasingly recognized and welcomed by road maintenance department.