Is the gas helium flammable? now, my stupid friends keep telling me that helium isn't flammable, but i bet my life is isn't, and i need you all to back me up. before you say "well it is because the hindenburg," stop! for a fact, the hindenburg was full of hydrogen. they used hydrogen because: - there is more on ;read this! i meant to say helium isn't flammable but my friends said it is. sorry i confused you all.