Great Wall 7805 chemical-resistant sealant is one of the official lubricants designated by China Aerospace. 

This product contains fluorine components and has extremely high stability. Its base oil is perfluoropolyether (PFPE). 7805 grease has excellent chemical inertness: non-combustible, radiation-resistant, strong acid-resistant, and strong oxidant-resistant. It also has excellent material adaptability. At present, this grease has been used in the aerospace field for many years with excellent and stable performance.