Simple past tense and past participle of fireproof.(verb)
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Use "fireproofed" in a sentence
"But for Mr. Epstein, Mr. Dylan "was—for a time—an American Orpheus, son of Apollo and the muses, fireproofed for a romp through hell.""
"FEMA noted in its report that the steel structure was fireproofed to 2 inches, but speculated that "During the course of the day, fires may have exposed various structural elements to high temperatures for a sufficient period of time to reduce their strength to the point of causing collapse.""
"Then I fireproofed the room itself by covering the walls and ceiling with fire blankets."