There are various alternatives available, some with different or lower PFAS content than traditional AFFF foams.
There are also several non-AFFF firefighting foam options available that don’t contain any PFAS, which are typically more expensive, but they don’t pose the same risks to human health and the environment.
A few of these non-AFFF firefighting foam alternatives include:
C6 Firefighting foam concentrates
These products typically use a different fluorochemical called 6:2 Fluorotelomer alcohol, or C6 FTOH.
C6 FTOH is structurally similar to PFAS, but it’s not as persistent in the environment, and it doesn’t build up in the human body as PFAS does.
However, C6 FTOH can still contaminate drinking water if it’s not used properly.
Firefighting foams containing C8 (a fluorosurfactant with a carbon chain length of eight) have begun to face legislation and regulation because the Environmental Protection Agency (EPA) has discovered that longer fluorosurfactants’ chains – those above six carbons – contain PFAS.
However, Fluorosurfactants whose chains are shorter – at six or fewer carbons long- don’t pose the same risks.
Fluorine-free foams
Fluorine-free foam is a manmade alternative to traditional foams used for fire suppression.
It contains surfactant blends and polysaccharides, which create a cooling blanket of bubbles when applied to fire fuels that prevent the spread of flames.
Unlike other options, the fluorine-free foam does not contain PFAS.
This gives it a clear environmental advantage, as it is less likely to contaminate its surroundings.
Dry chemical agents
Dry chemical agents are another fire suppressant option, which uses a chemical powder to extinguish flames.
Pressurized dry chemical agents work by creating a barrier between the fuel and the oxygen in the air, starving the fire of its needed elements.
One advantage of dry chemical agents is that they can be used on different types of fires, including those involving combustible liquids and energized electrical equipment.
Another advantage is that they can be discharged through small orifices, making them effective in suppressing hard-to-reach fires.
Still, many dry chemical agents are considered hazardous, so they must be used with caution.