From Longman Dictionary of Contemporary Englishheatproofheat‧proof /ˈhiːtpruːf/ adjective DHHOTheatproof material cannot be damaged by heat
Examples from the Corpus
heatproof• Place in a heatproof dish and sprinkle the grated cheese over the top.• If cooking in a pan, transfer the mixture to a heatproof dish.• Put them in a heatproof dish.• Place ginger in a heatproof glass jar or ceramic bowl.• Drain well and place on a heatproof platter.• Pour pan contents into heatproof sieve over a bowl. 