Incombustible

a.

1.

Not combustible; not capable of being burned, decomposed, or consumed by fire; uninflammable; as, asbestus is an incombustible substance; carbon dioxide is an incombustible gas. Incombustible cloth a tissue of amianthus or asbestus; also, a fabric imbued with an incombustible substance.

Adj.

1.

incombustible - not capable of igniting and burning Synonyms: noncombustible

noncombustible