Redispersible polymer powder is free flowing white or light yellow powder obtained through the spray-drying of aqueous emulsions, which is suitable for the production of various dry mortar. Redispersible Polymer Powder is re-emulsified with water and has the same properties as the original emulsion, that is a film can be formed after water evaporation. This film has high toughness, weather resistance and adhesion to a substrate. In addition, the latex powder with hydrophobic properties can improve the waterproof performance of the waterproof mortar.Water-reducing properties is mainly used for self-leveling.