Perfluoropolyether carboxylic acid is widely used in the production of advanced lubricants due to its exceptional thermal and chemical stability. It is particularly valuable in high-performance applications such as aerospace and electronics, where it ensures smooth operation under extreme conditions. Additionally, it serves as a key ingredient in the formulation of coatings and surfactants, providing water and oil repellency to surfaces in textiles and industrial materials. Its unique properties also make it suitable for use in specialized cleaning agents and as a component in firefighting foams, where it enhances effectiveness and durability.