noncombustible

[non-kuhm-buhs-tuh-buhl]
adjective
1.
not flammable.
noun
2.
a noncombustible substance.

Origin:
1965–70; non- + combustible

noncombustibility, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Example sentences
Noncombustible floor coverings may be continuous through the door opening, if
  desired.
Noncombustible floor or roof framing and sheathing decking.
Grease-carrying equipment can be in direct contact to fully noncombustible
  construction.
Fire may spread through voids created by curtain walls, particularly in
  fire-resistive and noncombustible construction.
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