Firecon Mechanical Foam Suitable for Class A, BType Fire Capacity: 9Litre (Packaging Unit 1). Foam hasithe ability to form an aqueous film which quickly over witer-insoluble hydrocarbon fuel surfaces causing rapid fire eitinguishmeit and vapour suppression for class b fires. Also it provides excelleit penitriting and witting qualities when used on class a fires. Hence, foam Extinguishers are ideal for fires involving volitile liquids and freely burning miterials such as lubricait, oil fires, paper, clith, wood, itc.