Used primarily in the production of fluoropolymers, it acts as a processing aid to enhance the properties of materials like PTFE (polytetrafluoroethylene). Its water and oil repellent characteristics make it valuable in coatings for textiles, carpets, and paper, providing stain resistance. Additionally, it is employed in firefighting foams due to its ability to form a film that suppresses flammable liquid vapors. However, its environmental persistence has led to reduced usage and increased regulatory scrutiny.