Polysulfide Impression MaterialPermlastic is a polysulfide, condensation-cured, elastomeric impression material in three viscosities.Regular 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.Light-Bodied Permlastic is the most free-flowing of the Permlastic materials. It is excellent for inlay and fixed bridge impressions. Light-Bodied Permlastic is a syringe material that is usually used with Heavy-Bodied Permlastic. Light Body bonds completely with both Regular and Heavy Bodies, resulting in impressions with great accuracy and fine definition.Heavy-Bodied Permlastic is formulated for use whenever a stiffer material is indicated. The heavy body consistency results in optimum compression of the Light-Bodied Permlastic in a double-mix, copper-band impression.