Printex XE 2 Imported furnace black Degussa Extenders / Fillers >> Carbon black Pigments >> Carbon Black SEALANT Printex XE 2 Imported Furnace Black (Extra Conductive Conductivity. Used as a pigment in caulks for interior and exterior applications and in expansion joints. Extra conductive imported furnace black. Used as a pigment in caulks for interior and exterior applications and in expansion joints.