Property of being permanently changed when subjected to heat, catalyst, ultraviolet light, or chemical reaction, and cannot be softened and reformed by reheating. As used in the coatings industry today, the original meaning of the term thermosetting has changed somewhat. It is now used to classify coating types according to how the resins cure, and the solubility of the cured film. Thus, the term thermosetting is virtually synonymous with the term convertible.
