Aerosol grenades are devices formulated to release their contents in a vapor cloud. Often referred to as Area Treatment Weapons, they are used to fill a space with irritants or inflammatory agents to force people to leave the area.
Aerosol Grenades were specifically designed to be used against barricaded subjects in indoor situations where traditional tear gas grenades cannot be used because of their high potential for fires and contamination.
An aerosol grenade requires no fuse or explosive charge to disseminate the irritant. Since aerosol valves are normally designed to work only in an upright position it was necessary to develop a valve that would work horizontally. Other modifications to the valve were made internally to speed evacuation of the can to under thirty seconds eliminating potential throwback. Unlike FREEZE formula which utilizes heavy solvents to deliver the irritant in a coherent liquid stream directly to the face of the subject, aerosol grenades dispense an irritant cloud in a volatile solvent.