The quality or state of being incombustible.(noun)
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Use "incombustibility" in a sentence
"This hood was of a waterproof silk, coated with powdered aluminum, that metal being used because of its semi-incombustibility."
"Here, again, we have a piece of very fine lace, which has been similarly carbonized, and displays the same qualities of ductility and incombustibility."
"But in our day, when the morality taught in the Gospel has penetrated more deeply into the strata of society, it seems to me an exaggeration to think the chaste scorn of the son of Jacob any more miraculous than the material incombustibility of the three young men of Babylon."