KalpEX Clean Agent Fire Extinguishers uses, clean agents, viz. HFC 236, Hfc 227, FM 200 super pressurized with nitrogen. These are light-weight & easy-to-use fire extinguishers which extinguishes fire within a span of 10 seconds only by a combination of chemical & physical mechanism without effecting the available oxygen. KalpEX Clean agent extinguishers are non-toxic and earth friendly. They don’t leave any residues.