Which of the following statements about Type II silicon impression materials is INCORRECT?

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They release hydrogen gas during casting if not completely cured.They demonstrate minimal shrinkage upon setting.Their tear resistance is inferior compared to polysulfide rubber materials.Their setting mechanism involves condensation polymerization.They are commonly used for preliminary impressions.

Explanation

Options A, B, and C are accurate characteristics of Type II silicon impression materials. However, option D is incorrect because Type II silicones set through addition polymerization, not condensation polymerization.