The redispersible polymer powder product is white or off white flowable powder, which is a copolymer of ethylene and vinyl acetate, and uses polyvinyl alcohol as a protective colloid. Purpose: ceramic tile adhesive bonding mortar of external wall external insulation system external wall external insulation system plastering tile jointing agent self flowing cement flexible putty for inner and outer walls flexible crack resistant rubber powder polystyrene particle thermal insulation dry powder coating polymer products with high requirements for flexibility effect: It has outstanding waterproof performance, good bonding strength, increases the elasticity of the and has a long opening time, endows the with excellent alkali resistance, improves the adhesion / adhesion, flexural strength, plasticity, wear resistance and workability of the mortar, and has stronger flexibility in the flexible crack resistant . Role of redispersible emulsion powder: redispersible emulsion powder forms a film after dispersion and plays a reinforcing role as the second adhesive; the protective colloid is absorbed by the system (it will not be damaged by water after film formation, or secondary dispersion); the film-forming polymer resin is distributed in the whole system as a reinforcing material, thereby increasing the cohesion of the