What is the shelf life of Fire Spray?

It has approximately the same shelf life as a traditional fire extinguisher. ANSI/UL standards say a fire extinguisher must stay pressurized for at least two years. Fire Spray has a three year Performance shelf life printed right on the can. We chose a very conservative time frame because this is a life safety device and the unit does not have an indicating gauge to tell the user if it is pressurized. The unit may last for 5 years or more.