What is high expansion foam primarily used for?

High expansion foam is primarily used for filling enclosed spaces, such as aircraft hangars, due to its unique ability to expand significantly and fill large volumes of space quickly. This type of foam is particularly effective in scenarios where traditional firefighting methods may be less effective, as it can envelop fires and smother them, effectively limiting the amount of oxygen available to sustain combustion.

In aircraft hangars, where there may be a risk of flammable liquids or materials, high expansion foam can quickly blanket the area, controlling the spread of flames and minimizing damage. The foam’s expansion allows it to cover and infiltrate intricate spaces and protect against re-ignition, making it a crucial tool in fire suppression strategies for such environments.

Other options are less relevant to the primary use of high expansion foam; for instance, though it can help manage certain types of fires, its best application is specifically in confined spaces where its expansive properties can be fully utilized.