Incombustible /(?)/

In·com·bus·ti·ble

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.

Phrases & Compounds
Incombustible cloth
a tissue of amianthus or asbestus; also, a fabric imbued with an incombustible substance.