Cerium oxide is primarily used as a polishing material.

Cerium oxide is an essential component in polishing powders for glass, screens, lenses, optical components, fluorescent lamps, crystal glasses, mirrors, decorative glass, flat glass, and all other types of glass products.

Cerium oxide has a long history as a glass polishing compound. It has been used for more than six decades and has proven to be one of the most effective materials for glass polishing applications.

During the glass polishing process, cerium oxide reacts with the glass surface, forming a cerium–oxygen–silicon compound. This compound is softer than glass, making it easier to process and helping to improve, accelerate, and enhance the overall glass polishing process.