As a water-soluble polymer compound, also known as water-soluble resin or water-soluble polymer, Hydroxypropyl Methyl Cellulose（HPMC） is s a hydrophilic polymer material by increasing the viscosity of mixing water to increase the consistency of its mixture and can be dissolved in water to form a solution or dispersion.

1. Hydroxypropyl methyl cellulose can enhance the adhesion to the surface of the wall, enhance water-holding capacity, and thus improve the strength of mortar.

The redispersible powder is a special water-based emulsion made by spray drying and a polymer binder prepared mainly based on the vinyl acetate-ethylene copolymer. After partial evaporation of water, polymer particles form a layer of polymer film by agglomeration and play the role of adhesive