Perfluoropolyether carboxylic acid is widely used in the production of advanced lubricants due to its exceptional thermal and chemical stability. It is particularly effective in high-temperature environments, making it suitable for aerospace and automotive applications where extreme conditions are common. Additionally, it is utilized in the formulation of coatings and surface treatments, providing water and oil repellency to materials such as textiles, paper, and electronics. Its unique properties also make it valuable in the manufacturing of specialty polymers and as a surfactant in various industrial processes.