AFFF and AFFF-AR extinguishers are designed to fight type B (flammable liquids) and type A (solid combustible materials) fires with a special focus on liquids such as oils, fuels and solvents.

1. AFFF (aqueous film-forming foam):
   It is especially effective for fires in hydrocarbon flammable liquids (such as gasoline, diesel, oil and other fuels). The foam acts by creating a layer that suffocates the fire and prevents the flammable liquid from coming into contact with the air, preventing the spread of the fire.
2. AFFF-AR (aqueous film-forming foam for hydrocarbon and polar liquids):
   This type of extinguisher is similar to AFFF, but has the additional ability to fight fires caused by polar liquids (such as alcohols, acetone, methanol and other chemicals). The AFFF-AR foam is formulated to be more effective in this type of fire, where liquids do not behave in the same way as common hydrocarbons.

Recommendations for customers who should purchase AFFF and AFFF-AR extinguishers:

1. Petroleum and chemical industries:
   Refineries, petrochemical plants and companies that handle hydrocarbons (gasoline, diesel, oil, kerosene) must have AFFF or AFFF -AR extinguishers due to the high risks of fires from flammable liquids they handle on a daily basis.
2. Storage of fuels and flammable products:
   Gas stations, chemical warehouses and flammable liquid storage terminals require AFFF-AR extinguishers to protect against fires in polar liquids (such as alcohols) and hydrocarbon liquids.
3. Hazardous product transports:
   Companies transporting flammable chemicals, fuel tankers, mobile storage tanks and tankers must have these extinguishers, as fires in these modes of transportation can involve both polar and non-polar flammable liquids.
4. Industrial manufacturing and storage facilities:
   Plastics factories, solvent producers, automotive shops and companies that manufacture chemicals should have AFFF-AR extinguishers, since they handle both flammable products and chemicals that may be more complex to extinguish.
5. Aviation and airports:
   Airports, especially in maintenance and fuel areas, where fuel (hydrocarbon) and chemical (polar liquid) fires are a constant threat, should be equipped with AFFF or AFFF-AR extinguishers.
6. Shopping centers and large surfaces with flammable liquids:
   Supermarkets, appliance stores, warehouses and shopping centers that sell flammable products such as solvents, paints or cleaning products should have AFFF extinguishers, as these are effective in extinguishing flammable liquids that could be found in these spaces.