Powder coating represents a type of coating typically applied as a free-flowing, dry powder. Unlike conventional liquid paint, it doesn't require a solvent to keep the binder and filler parts in a liquid suspension form. The coating is applied electrostatically and then cured under heat, which allows it to flow and form a "skin". It is often used for coating of metals, such as household appliances, aluminium extrusions, drum hardware, and automobile and bicycle parts. The powder may be a thermoplastic or a thermoset polymer. It provides a hard finish that is tougher than conventional paint. Powder coating is mainly used for coating of metals, such as household appliances, aluminium extrusions, and automobile and bicycle parts. Its advantages include a significant reduction in environmental impact compared to solvent-based coatings, superior finish quality, and high efficiency.