VAE is a water-soluble white or off-white flowable powder, a copolymer of ethylene and vinyl acetate, with polyvinyl alcohol as a protective colloid. It has extremely outstanding waterproof performance, good bonding strength, increases the elasticity of the mortar and has a longer open time, gives the mortar excellent alkali resistance, and improves the adhesion/adhesion, flexural strength, plasticity and resistance of the mortar. In addition to grinding performance and workability, it has stronger flexibility in flexible anti-cracking mortar. Used in tile adhesive, external wall and external thermal insulation system bonding mortar, external wall external thermal insulation system plastering mortar, tile grout, self-flowing cement sand, internal and external wall flexible putty, flexible anti-cracking mortar, rubber powder polystyrene Granular thermal insulation mortar, dry powder coating, polymer mortar products with high requirements for flexibility.