Freeze spray (cold spray or vapocoolant) is a type of aerosol spray product containing a liquified gas used for rapidly cooling surfaces, in medical and industrial applications. It is usually sold in hand-held spray cans. It may consist of various substances, which produce different temperatures, depending on the application.
Some of them are highly flammable.[1] Several other types of compressed gas sprays also have a freezing effect: for example, tetrafluoroethane, gas dusters, liquid nitrogen, and carbon dioxide fire extinguishers.