Permlastic is a polysulfide, condensation-cured, elastomeric impression material in three viscosities. The Regular Body Permlastic is recommended for partial or full denture impressions because it has a high degree of flow that will register the finest detail. While usually used in single-mix, it can be used with Light-Bodied Permlastic for crown and bridge impressions. It will not tear when being removed from undercuts.