With the rapid development of construction industry, the amount of architectural coatings, especially exterior wall coatings, is growing year by year. However, more common problems of construction quality arise with the increase of project amount. Exterior wall putty is leveling material of the protective layer, and putty fitting for external thermal insulation system should have a high bonding strength, good performance of crack resistance and excellent resistance to water. The basic material in this paper is cement and coarse whiting, talcum powder and quartz powder are the fillers. Then the basic mix of putty will be got through orthogonal experimental design. In order to improve the performance and research inorganic materials and associated auxiliary for external wall putty performance impact, pasty exterior wall putty can be prepared through mechanical mixing and by adding some relevant inorganic materials and auxiliaries. Results indicate that this kind of exterior wall putty is easy to burnish the powder and have good performances of workability, water resistance, high bonding strength and dynamic crack resistance. Which has better performances than that sold in market, especially for the performances of bond strength, dynamic crack resistance and water absorpution.
