Every combustible has its specific properties. Therefore there are various extinguishing agents.

The most common are:

Extinguishing powder consists of a mixture of chemicals which prevent combustion. The molecules form a layer around the burning material and suffocate it. They also trigger a chemical reaction which stops combustion. Extinguishing powder is very effective and suitable for almost every kind of fire. It has, however, one disadvantage. When used, a cloud of powder is formed reducing visibility and strongly soiling the whole area around the fire. It is therefore not recommended for use in enclosed spaces, and if possible it should not be inhaled.

Extinguishing foam is water to which a foaming agent is added using air. It forms an airtight layer, which covers the burning matter and so suffocates the fire. At the same time the water has a cooling effect and reduces the temperature below the ignition point preventing re-ignition. Extinguishing foam is used to fight fires of solids (fire class A) and liquids (fire class B).

Water is the oldest and most elementary extinguishing agent of all. It is non-toxic and leaves no residue. Water reduces the temperature of the burning material below the ignition point and thus impedes combustion. The formation of combustible gases and vapours which sustain the thermal reaction, is prevented.