Building Ordinary Lightweight Plaster Gypsum is a one-component dry powder plastering material. It is produced by premixing and homogenizing gypsum as the main binder with lightweight aggregates (such as expanded perlite, polystyrene beads, etc.) and functional additives including water retention agents, retarders, and water reducers in a factory setting. When mixed with water, the product exhibits excellent workability. After hardening, it forms a lightweight, high-strength plaster layer with thermal insulation properties. It is suitable for leveling and decorative priming of interior walls and ceilings in buildings.