| abstract |
(57) [Summary] [Purpose] When exposed to high temperatures, it releases an inert gas to prevent the occurrence of fires, requires no water management, and is easy to handle and dispose of waste liquid. To provide a flame-retardant fluid suitable as hydraulic oil, cutting oil, processing oil, grease, etc. [Structure] A liquid or semi-solid flame-retardant fluid containing a foaming substance that generates an inert gas during foaming, particularly preferably a base oil and a foaming substance that generates an inert gas during foaming. It is a liquid or semi-solid flame-retardant fluid containing it. |