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Foam Fire Extinguishers

Need help? Need help? What are Foam Extinguishers used on? The Most Complete Range of Foam Fire Extinguishers - Delivered Fast!

Foam fire extinguishers are highly versatile and can be used on both solids and certain types of burning liquids, such as paint, turpentine or petrol. Although more limited in their application, when paired with a CO2 extinguisher foam fire extinguishers are a versatile piece of kit that can be used on a wide range of fires.

As they are much lighter than other types of extinguishers, foam fire extinguishers are very user friendly and are, for the most part, non-toxic and will not cause long-term damage to most materials. Care should be taken, however, if using a foam fire extinguisher on small electrical fires.

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What is a Foam Fire Extinguisher Used For?

Foam fire extinguishers are best used on fires involving solid combustible and organic materials, such as wood or paper, as well as certain types of liquids and chemicals. It should be noted, however, that this does not include Class F fires, meaning those involving cooking oils and fats, or Class C fires, such as those involving flammable gases.

Foam fire extinguishers are typically found in industrial settings, such as warehouses and factories, and would not generally be recommended for domestic use or in commercial kitchens, although certain foam extinguishers are rated for use on Class A,B and F fires such as our Multichem 6L Fire Extinguisher.

Although not specifically designed for electrical fires, foam fire extinguishers can be used on smaller electrical appliance fires if the extinguisher has passed the 35k conductivity test. This is an additional safety measure intended to protect individuals from inadvertently using a foam fire extinguisher on an electrical fire. This greatly reduces the risk of the user getting an electric shock. However, it is still generally recommended to pair a foam fire extinguisher with one specifically designed for putting out electrical fires, such as a CO2 Fire Extinguisher, in most environments to have the majority eventualities covered.

How to Identify Foam Fire Extinguishers

Foam fire extinguishers are identifiable by a cream label on the cannister, or by the words ‘Foam’ in large cream text.

Most foam fire extinguishers are water based and use a foaming agent, known as aqueous film forming foam, which allows the foam to form and then float on top of the burning liquid. This creates a sealed barrier between the flames and the surface of the burning substance, which prevents the fire from continuing to burn by rapidly cooling the affected substance. The foam barrier then works to smother the fire and seal in the flammable vapours, thus preventing the flames from reigniting.

Foam Fire Extinguisher Use

If you are using a foam fire extinguisher on a solid material, simply point the nozzle at the base of the flames and cover the entire affected area until the flames have died out. When using this type of extinguisher on a contained liquid fire, do not point the jet straight into the centre of the fire. Instead, work from the outside in, slowly covering as much of the affected as possible until the fire is completely extinguished.

Applying the foam with this method will ensure that the fire does not splash and spread. If you are using the extinguisher on a free-flowing liquid fire, spray the foam in a gentle but steady sweeping movement across the top of the enflamed substance. This will allow the foam to drop down and settle on top of the burning liquid.

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