Trolley-mounted fire extinguisher serves as a back-up solution. The very size and power of trolley-mounted fire extinguishers make them an ideal choice for any delayed attack on fire. They are the second line of defense when hand-held extinguishers are not able to douse fire. Sometimes, these large-sized extinguishers could be the only solution for such places that are in isolated regions or are very crowded and where fire brigades may take time to reach or may not reach at all. Trolley-mounted fire extinguishers are also ideal for locations where volatile class B materials are stored in abundance and there is no time to wait for a fire brigade in case of a fire.

These cartridge type extinguishers use foam to take on Class A and B fires. The Ceasefire Foam Cartridge is also equipped with a specialized nozzle or aerator which produces a thick foam that coats the surface of the fire and cuts off the oxygen supply.