Hydroxyethyl methylcellulose is widely used in the construction field, mainly used in cement mortar, tile adhesive, waterproof coating, latex paint, building sealing materials, etc. Hydroxyethylmethylcellulose can increase the viscosity and adhesion of cement mortar, making the mortar denser and improving its crack resistance and impermeability. In fields such as latex paint and waterproof coatings, hydroxyethyl methylcellulose can increase the adhesion and stability of the coating and improve the waterproofness and durability of the coating.