Calcium Stearate is used in the manufacture of PVC. It acts as an external lubricant in PVC processing. It promotes fusion and has a reasonable stability to heat. Calcium Stearate is used as thickening agent for lubricating grease. Calcium Stearate reduces extruder pressure build-up of rigid PVC compounds when used as a processing aid during the manufacture of pipe, siding and injection molded fittings.