Non-heatproof

Lacking the ability to withstand or resist high temperatures without damage or alteration. Objects described as non-heatproof are susceptible to melting, warping, discoloration, or structural failure when exposed to significant heat sources. This characteristic makes them unsuitable for applications involving high temperatures, such as use in ovens, near flames, or with hot liquids. The degree of heat resistance varies, implying potential damage from even moderate warmth depending on the material.

Non-heatproof meaning with examples

• The plastic food container was clearly non-heatproof, as it softened and deformed when placed near the hot stovetop. Sarah learned a valuable lesson about kitchen safety that day. The melted container was a mess to clean up, and she was lucky no food spilled over and burned her. This reinforced the need to use proper containers for cooking.
• When baking cookies, the instruction stated to only use a heatproof baking tray. I learned my lesson about the importance of this detail after my wooden baking tray, being non-heatproof, started to smoke in the oven, filling the kitchen with the smell of burning wood. The cookies were fine, but the tray had to be replaced.
• The delicate silk scarf, known to be non-heatproof, was ruined after being accidentally left near a hot iron. The fibers shriveled and the vibrant colors faded, showing its utter lack of thermal resistance. The dry cleaning bill was higher than expected to even attempt cleaning the mess.
• We discovered the hard way that the thin paper plates provided for the outdoor barbecue were decidedly non-heatproof. As soon as the hot grilled food was placed on them, the plates began to sag and eventually tear. The whole point of paper plates is to be disposable, but we had a bigger mess than before.