Don't worry about which fire extinguisher extinguishes which fire group - JUST EXIT.
To date, fire extinguishing sprays and extinguishers have been effective on one to three fire groups. With iBlockFIRE you don't wonder "Will it extinguish? What should I use to put out the fire?" In any of the five different types of fire, you can use iBlockFIRE and be sure that you made the right decision.