Foam Extinguishers

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Foam fire extinguishers are traditionally used for tackling fires involving flammable liquids (Class B) as well as solid combustible materials (Class A). They work by forming a blanket over the fire surface, helping to cool flames and suppress vapours.

Why it works: foam spreads across burning liquids, sealing the surface and reducing the release of flammable vapours while also providing a cooling effect.

✅ Key benefits

  • Effective on flammable liquid fires (Class B)
  • Cooling action helps reduce re-ignition risk
  • Multi-risk coverage for Class A and B fires
  • Commonly specified for fuel and liquid storage areas

🏭 Best for

Workshops, garages, fuel handling areas, storage rooms for flammable liquids, and industrial environments where liquid fire risks are present.

⚠️ Important considerations

Many traditional foam extinguishers contain PFAS “forever chemicals”, which are being phased out across the UK and Europe due to environmental and health concerns. Even newer fluorine-free foams still require specialist disposal and are not considered truly “green” when end-of-life is taken into account.

🌍 Environmental impact

If sustainability, compliance, or future-proofing is a priority, it’s important to understand how foam extinguishers are changing and what alternatives now exist.

🧠 Helpful guides

Learn more about safer and more sustainable fire protection: Environmental impact of fire extinguishers  •  Extinguisher placement