A condition in which the vulcaninzation or curing has not been adequate.

A condition or degree of cure that is less than optimum, i.e. when insufficient time and/or temperature has been allowed for adequate cure; may be evidenced by tackiness, longness, or inferior physical properties.

The result of curing a paint at either too low of a temperature or too little time, resulting in inadequate hardness and solvent resistance.

failure of the vulcanization reaction to go to completion or very close to completion, so that the crosslink concentration in the elastomer is not sufficient for full development of final properties