Spraying Polyurea elastomer (spray Polyurea Elastomer, hereinafter referred to as the Spua) technology is abroad for nearly a decade, the following high solid coatings, water-based coatings, radiation curing coatings, powder coatings, such as low (no) pollution coating technology, in order to meet the environmental requirements of the development, development of a new solvent-free, pollution-free green construction technology, it is in the reaction Injection Molding (RIM) technology based on the development of the main raw material is the United States Texaco Huntsman Company first developed the end of the amino-oxide propylene ether (end of polyether), the product brand is Jeffamine. By the end of the amino polyether, liquid amine extender, pigments, fillers and additives to form the color paste (r ancestor), and the other component of isocyanate and low poly two yuan alcohol or ternary alcohol reaction system (a component). A component and r components are sprayed or cast polyurea elastomers through the H-series host and GX-7 series Lance produced by the United States Gusmer. The process is a rapid reaction spraying system, the raw material system does not contain solvents, curing speed, simple process, can be very convenient in the vertical surface, surface spraying more than 10 mm thick coating without flow. The Spua technology has completely broken through the limitation of traditional environment-friendly coating technology. Therefore, the advent of the technology, it has been rapid development.