Polyvinyl alcohol (PVA) powder is used as an additive in construction materials like dry putty, mortar, and tile adhesive to improve flexibility, water retention, and viscosity. It adheres well and is widely used in papermaking, textiles, adhesives, films, and dry mortar. PVA powder is specialized for use in building mortar and putty as an additive and is easier to dissolve than flakes. It can be supplied in different mesh sizes and has specifications for viscosity, alcoholysis degree, volatility, purity, ash, and pH.