I have one in all my cars and one in my kitchen. I think they work and don't care if they're UL listed "yet." Is the UL agency gonna come help you when your normal extinguisher shoots it's load in 12 seconds and you're standing there holding an empty canister?
It was featured on Leno's Garage and he's no idiot.
Also, the element extinguishers, as you've probably already researched, won't cover your entire engine bay in chemicals.
That’s funny, Jay Leno approved... Well, I’m not an idiot either and I can attest to uncertified fire safety devices causing million’s in damages when they failed to deliver as advertised. I’m well aware of the makeup of all fire extinguisher’s, that is not what I was referencing. There is a very compelling reason why countries such as the USA and Canada have required certification of everyday devices used in our live’s. BTW, it is not UL’s job to come and help you when you shoot your load in 12 second’s... It’s your responsibility to prevent a fire from occurring in the first place. Should one start, you want the most effective, thoroughly tested and properly assembled fire extinguisher in your hand’s at that moment.... Minimum certification requirements are not meant to stop a mfr from selling their product in the market, they are implemented to provide a measure of confidence to the consumer. This particular extinguisher mfr should approach the required North American certification agency's and have a Standard developed for their product and then meet the minimum requirements like all the other good mfr’s out there. Lower standard’s? Be careful what you wish for. Good luck with your fire extinguisher.