ʻOku hoko ʻa e ʻosikena ko ha combustive accelerant, ka ʻoku ʻikai ko ha meʻa ia ʻoku velangofua pea ʻoku ʻikai ke ʻi ai ha meʻa ke ne maumauʻi. He ʻikai faitoʻi ʻita pe combust mei oxidation ngaahi toʻonga, naʻa mo e 100% tokanga.
Neongo ia, ʻe lava ke fakatupu ʻe he concentrations maʻolunga ʻo e ʻokisikena ʻa e lolotonga ʻi he taimi ʻoku nau fehangahangai ai mo e vela mei he fekainaki pe ngaahi kalofiama ʻuhila ʻi he ʻao ʻo combustibles, hange ko ha niʻihi meʻa koʻeni.