Redispersible Polymer Powder(RDP) is water - soluble redispersible powders and can be divided into ethlene inyl acetate copolymer,vinyl acetate /tertiary carbonate copolymer, acrylic copolymer. Powder adhesive made after spray drying. This powder can be redispersed into an emulsion quickly after contact with water. Because RDP has high binding capacity and unique properties, such as water resistance, workability, and thermal insulation, it is widely used in construction field.