Spraying Polyurea Elastic materials technology is a kind of reactive, solvent-free, non-polluting and mechanical spraying technology which has been developed in the last 20 years. It comes out with excellent physical and chemical properties, excellent technology and environmental protection, has been rapid development, widely used in construction, energy, transportation, water conservancy, chemical, electromechanical, environmental protection and other fields, showing a strong vitality, and than the traditional waterproof, protective technology has a strong advantage. Polyurea Spray after the curing speed is very fast, generally in a few seconds or a few 10 seconds that is cured, 1 h to reach the walking strength, the construction site can enter the next procedure. Polyurea Spray Molding thickness can be arbitrarily set, from 0.5 mm to a few millimeters can be completed once construction. Spraying on the vertical surface or even on the top surface can ensure smooth, not flowing phenomenon. Since Polyurea reacts very quickly at room temperature, water molecules in this system are not able to react with isocyanate, so the ambient humidity does not adversely affect the quality and surface of the coating. This avoids the polyurethane waterproof coating often encountered in the construction of the humid environment problems, facilitate the construction. Spray Polyurea coating, such as anti-corrosion coating, in addition to tolerance to dilute acid corrosion, but also on salt water or salt spray corrosion has a prominent tolerance, which makes it particularly suitable for coastal areas, both waterproof and anti-corrosion.