Last updated: 16/10/2022

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A powder fire extinguisher is a dry chemical type of fire extinguisher. It uses potassium bicarbonate to put out fires and can be used on electrical, wood or paper based fires.

The best Powder Fire Extinguisher in the UK: Our selection

Powder Fire Extinguisher: Frequently asked questions

What types of Powder Fire Extinguisher are there and what determines a good product?

There are two types of Powder Fire Extinguishers, Water and Dry Chemical. The dry chemical extinguisher is the most common type used in homes today because it has a wider range of applications than water does. It can be used on all classes A fires (solids that burn) except for electrical equipment which requires an electrically non-conductive agent such as CO2 or Halon gas to put out the fire safely without causing damage to sensitive electronics components inside computers and other electronic devices.

The main factors that determine a good powder fire extinguisher are the type of agent used, and how it is discharged. There are two types of agents in use today; dry chemical and water based (aqueous). Dry chemicals have been around for many years but they do not work well on all powders. Water-based agents were developed to overcome this problem, however there can be some issues with them as well. For example, if you put out an electrical fire using water then you will likely cause more damage than good because electricity does not conduct through water very easily so your wires may still short circuit even though the flames are gone. This is why we recommend having both kinds available at your facility or home – one for each situation.

Who should use a Powder Fire Extinguisher?

Anyone who has a fire extinguisher should know how to use it. If you have never used one before, take the time to learn how they work and what type of fires each is best for fighting. You will be glad that you did.

Based on what criteria should you buy a Powder Fire Extinguisher?

You should buy a powder fire extinguisher based on the type of material you are trying to put out. For example, if it is an electrical fire then use a water-based or foam-based extinguisher because they will not conduct electricity and cause more damage to your equipment. If there is no risk of electrocution involved, then you can use any dry chemical powder fire extinguishers as long as they have been tested for that specific application (i.e., paper/wood).

The first thing you need to look out for is the rating of a powder fire extinguisher. This will tell you how much water it can hold and what type of fires it can be used on. You should also check if there are any additional features that come with the unit such as an auto-reset function or a pressure gauge which tells you when your extinguisher needs recharging.

What are the advantages and disadvantages of a Powder Fire Extinguisher?


Powder Fire Extinguishers are the most effective type of fire extinguisher for fires involving flammable metals, such as magnesium and titanium. They also work well on Class D (flammable liquids) fires that involve combustible metals like aluminum or potassium. These types of extinguishers can be used to combat electrical equipment fires because they do not conduct electricity from one item to another in an interconnected system. The powder is non-conductive so it does not cause a shock hazard when fighting these types of electrical equipment blazes.


The main disadvantage of a powder fire extinguisher is that it can be difficult to use. This type of extinguisher requires the user to pull out an inner tube and then shake or tap the unit until the contents are released into a cloud over the flames. It may take several tries before you get enough powder on top of your flames, so this method isn’t ideal for large fires in which time is critical. Powder also leaves behind residue after being used, making cleanup more complicated than with other types of fire extinguishers.

Shopping Guide: Everything you need to know

Which brands and manufacturers are represented in our review?

In our review, we present products from various manufacturers and suppliers. The list includes products from the following brands and manufacturers, among others:

  • FireShield
  • FireShield PRO
  • AA

What is the price range of the featured products?

The cheapest Powder Fire Extinguisher in our review costs around 16 pounds and is ideal for customers who are conscious about their money. However, those who are willing to spend more money for better quality can also spend around 35 pounds for one of the more expensive products.