Which of the following statements is NOT true about impression compound?

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Deforms when stored at room temperatureFunctions as a thermoplastic materialExhibits greater flow after being mixed with waterHas a low thermal conductivity coefficientIs commonly used for preliminary dental impressions

Explanation

Impression compound is known to warp at room temperature, behaves as a thermoplastic (not thermoset) material, flows better when kneaded with water, and has a low thermal conductivity. Therefore, the incorrect statement is that it is a thermoset material.