Health Is Novacool an Afff? Is Novacool an Afff? Novacool UEF Foam, a multi-purpose fire extinguishing foam, replaces aqueous film-forming foams (AFFF) and ozone-depleting halon gases, which release both toxic hydrofluoric acid and fluorocarbons into the environment during use. Related Posts:10 best ozone generators for hunting in MayWhy Halon fire extinguisher is banned?What year did Mathews halon 6 come out?Is fluorine metal or nonmetal?