Waterproof polyurethane coating and preparation method used in construction. It points from the Group A points A and B in accordance with 1.0:1.0 to 2.5 weight ratio combination, which, K11 waterproof coating, Group A points containing 50 to 130 parts by high crystallinity polyester oligomer, 18 to 45 parts more isocyanates, 5 to 15 parts phthalate, 0.1 to 0.8 parts catalyst, Part B contains 3 to 15 parts curing agent, 10 to 25 parts reinforcing agent, 17 to 35 parts of a lubricant, waterproof polyurethane coating, 20 to 36 parts filler, from 5 to 18 parts of a pigment. The method chosen polar, high degree of crystallinity linear polyester and polyisocyanate reacting Part A, Part A and Part B of the good cooperation of the two-component polyurethane waterproof coating, double set cured elastomeric material were mixed soon after orientation crystallization of the tensional force waterproof coating, the material has a high tensile strength. Polyurethane waterproof coating is a high elongation, high tensile strength, low temperature flexibility and impermeability, excellent bonding performance, construction and convenient waterproof coating, and other widely used in roofing, underground engineering and kitchen water projects . 1930s Germany, Britain, France and other European countries, first of all the research, development and promotion of the use of this new type of waterproof material. Subsequently, the United States and Japan have carried out research and development in this area, promote the use of polyurethane waterproof coating for roofs, walls, basement, kitchen, bathroom, balcony, toilet, parking, swimming pools and other water and moisture. 951 polyurethane waterproof coating, long the source of waterproof material (online consultation), waterproof coatings provided by the Weifang City waterproof material Co., long the source. Weifang City for the source of waterproof material Ltd. (www.jiuyuanfangshui.com) Shandong Weifang, waterproof, moisture-proof material leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In the long waterproof material source leadership with the staff warmly welcome all inquiries negotiations to create a source of long waterproof material better future.