sentences:  The Federal Aviation Administration has used the time-to-flashover of materials in aircraft cabin tests as the basis for a heat release and heat release rate acceptance criteria for cabin materials for commercial aircraft.The figure shows how the best organic-matrix made of engineering thermoplastics reaches flashover after the 20 minute ignition period and generates appreciable smoke, while the geopolymer-matrix composite will never ignite, reach flashover, or generate any smoke in a compartment fire.Carbon-geopolymer composite is applied on racing cars around exhaust parts.