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. The sealant filling and sewing process on the material properties to overcome the defects of traditional asphalt materials.Best series pavement crack sealant production by the best international company, its main ingredients of modified asphalt and thermoplastic rubber composite material, the main features are low viscosity under high temperature and low temperature high elasticity. According to the using area of environmental temperature, this product is divided into cold low temperature type, the common temperate type, high temperature hot type; According to the heating mode, the product can be divided into direct and indirect heating heating.Processing the asphalt surface crack, choose a suitable type of sealant is key. According to different areas and different climatic conditions and characteristics of pavement crack and select suitable sealant as pavement crack repair material.performanceThe sealant for solid-state modified asphalt and thermoplastic rubber composite materials, hot melt quickly, strong adhesion, good resistance to deformation recovery performance. Compared with other types of sealant, the type with low consistency, easily penetrate into all kinds of cracks, etc. In the summer, the high temperature softening point is 96 ℃; In winter, and its resistance to low temperature of approximate - 32 ℃, therefore more suitable for temperature span of temperate environmentSealing mechanismUnder 193 ℃ high temperature, the liquid sealant and combination of asphalt pavement,