No packing set works like it, or protects your shafts better. In operation, CMS-2000 Pump Sealants cling to shaft or sleeve on the inside diameter and to the stuffing box wall on the outside diameter. The Sealant is designed to experience Internal Laminar Shear™ so that relative rotation takes place within the low friction Sealant, not against your shaft or sleeve. Equipment is protected from the aggressive fre..