For my 2c worth... I would interpret it as such...
It is
NOT a fire-extinguisher as such, but a product that once
sprayed/dried onto some surface, then that '
surface' now resists fire!
However, the initial can contents contains some sort of
hydrocarbon chemical too, to act as the
initial propellant from the can.
Further however, there's a problem with the nozzle etc in initially 'releasing' the contents, so the can itself could still be mostly
full, (including the probably flammable propellant!), so if disposed of in a fire, it could blow up!
