Fireproofing, a passive fire protection measure, refers to the act of making materials or structures more resistant to fire, or material for use in making anything fire-proof, or the act of applying such materials. Applying a certification listed fireproofing system to certain structures allows these to have a fire-resistance rating.
An item classed as fireproof is resistant in specified circumstances, and may burn or be rendered inoperable by fire exceeding the intensity or duration that it is designed to withstand.