Foam fire extinguishers, renowned for their adaptability and efficiency, serve a pivotal role in fire safety. These extinguishers utilise a foam-based extinguishing substance, commonly referred to as aqueous film forming foam (AFFF), to combat fires, rendering them particularly suitable for dealing with Class A and B fires involving flammable liquids https://www.thesafetycentre.co.uk/fire-products/fire-extinguishers-and-fire-blankets/foam-fire-extinguishers-thomas-glover