Foam fire extinguishers are the most effective and safest extinguisher to use on fire involving flammable liquids (Class B), and solid combustibles (Class A). Typically, these can be very dangerous fires which are the burning of liquids such as petrol, diesel, paints, oil, solvents, spirits, and a lot else besides., these foam fire extinguisher are suitable for fighting fire of Petrol, Oil, Paints, Spirits, Chemicals and Flammable liquids fires.