Monnex Fire Extinguishers for High-Risk Flammable Liquid Fires
Monnex is a specialist high-performance dry powder extinguishing agent designed for rapid knock-down of demanding Class B flammable-liquid fires and appropriate Class C flammable-gas risks.
It is typically specified for higher-risk industrial applications where conventional extinguishing media may not provide the required performance, including petrochemical environments, fuel handling, motorsport, offshore applications and some process industries.
Kings Fire can advise on the suitability of Monnex extinguishers for your premises, supply and commission appropriate equipment and provide ongoing fire extinguisher servicing as part of your fire safety arrangements.
Where Are Monnex Extinguishers Used?
Monnex is particularly associated with higher-risk environments involving flammable liquids and gases, including:
- Fuel storage and handling areas
- Petrochemical and process industries
- Motorsport and vehicle-related risks
- Offshore and marine-related industrial environments
- Industrial applications involving solvents and flammable liquids
Monnex powder provides a particularly rapid knock-down effect on appropriate Class B fires. Current Monnex extinguishers can achieve high Class B fire ratings, depending on the model and manufacturer.

Monnex Is a Specialist Extinguisher
Monnex should not be treated as a general-purpose replacement for standard fire extinguishers.
The suitability of any powder extinguisher should be assessed against the fire risks, environment, potential effects of discharge and the recommendations of BS 5306-8:2023.
Powder can significantly reduce visibility when discharged and can create substantial clean-up requirements, so the location and intended application should be carefully considered before specification.
Professional Supply & Servicing
Kings Fire can assess specialist fire extinguisher requirements and advise whether Monnex is appropriate for the risks present.
Where suitable equipment is available, we can supply and commission the extinguisher and incorporate it into your ongoing fire extinguisher servicing programme.
For unusual or higher-risk applications, we recommend discussing the hazard with our team before ordering or specifying equipment.
Monnex Fire Extinguisher FAQs
Answers to some of the most common questions about Monnex specialist dry powder fire extinguishers and where they may be suitable.
What is Monnex fire extinguisher powder?
Monnex is a specialist high-performance dry powder extinguishing agent designed to provide rapid knock-down of appropriate flammable-liquid and flammable-gas fires. It is generally used in higher-risk industrial and specialist environments rather than as a standard extinguisher for ordinary commercial premises.
What fires are Monnex extinguishers suitable for?
Monnex is primarily intended for appropriate Class B flammable-liquid and Class C flammable-gas risks. Typical applications can include fuel handling, petrochemical environments, industrial processes, motorsport, aviation-related risks and other specialist locations involving flammable liquids or gases.
Is Monnex suitable for ordinary offices or shops?
Monnex is normally considered a specialist extinguisher rather than a general first choice for ordinary offices, shops or similar premises. Dry powder discharge can significantly reduce visibility and create substantial clean-up requirements, so the fire risks and environment should be assessed carefully before it is specified.
Can Monnex be used around electrical equipment?
Dry powder extinguishing agents are electrically non-conductive, but that does not automatically make Monnex the best extinguisher for every electrical risk. The equipment involved, surrounding environment, fire hazards and consequences of powder discharge should all be considered when selecting suitable fire extinguishers.
Can Kings Fire supply and service Monnex extinguishers?
Yes. Kings Fire can assess specialist extinguisher requirements, advise whether Monnex is appropriate for the risks present, supply and commission suitable equipment where available, and incorporate Monnex extinguishers into an ongoing fire extinguisher servicing programme.
Need Advice on Monnex or Specialist Fire Extinguishers?
Monnex is a specialist extinguishing medium and should be selected according to the specific fire risks present.
Kings Fire can assess your requirements, advise on suitable specialist fire extinguishers, supply and commission appropriate equipment and provide ongoing servicing.
Call 01462 337037 or contact Kings Fire to discuss your requirements.

