heatproof ( synonym found)
Definition of heatproof:

°insulating and incombustible.
"For safety always use bunsen burners on heatproof mats."
°To make insulating and incombustible.
Definition of heatproof:

°insulating and incombustible.
"For safety always use bunsen burners on heatproof mats."
°To make insulating and incombustible.
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