Firefighting agents
Firefighting agents include: ‘…water-based firefighting agents such as foam. These agents are used to form an aqueous film over the inventory to prevent the escape of flammable vapours with the foam layer excluding oxygen and provides a cooling effect.’
Ref Containment systems for the prevention of pollution, Secondary, tertiary and other measures for industrial and commercial premises (CIRIA C736), published by CIRIA in 2014.
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