AeroShell 7 grease is a synthetic ester that has been thickened with Microgel. Since it also contains clay it shouldn t be mixed with soap-based grease. As for the AeroShell 7 mil. spec. it meets the standards of MIL-PRF-23827C Type II which means it has passed rigorous tests to perform well under harsh conditions. See the specifications for more information and the MSDS for safety and proper use instructions.