A mold release agent is a thin film or coating applied to the surface of a mold to prevent the molded material—like plastic, rubber, composite, concrete, or metal—from sticking. It acts as a barrier that ensures smooth demolding, reduces defects, protects the mold’s surface, and helps maintain consistent surface finish on the molded part. Key types include solvent-based, water-based, silicone, wax, polymer, or powder-based systems. Effectiveness depends on correct choice for mold and material, proper surface cleaning, even and light application, and the ability to endure temperature, pressure, and repeated use without degrading.