Used as a highly effective light stabilizer in polymers, protecting materials from degradation caused by UV radiation. It is commonly added to plastics, coatings, and adhesives to prevent yellowing, cracking, and loss of mechanical strength during outdoor exposure. Its primary role is in polyolefins, polyurethanes, and engineering plastics where long-term weatherability is critical. Due to its low volatility and good compatibility, it provides durable protection in films, fibers, and molded parts. Also used in combination with other stabilizers to enhance overall performance in demanding environments.