The PVC operations of Chemplast began in May 1967 at Mettur, near Salem in Tamil Nadu, with technology from BF Goodrich, USA, to manufacture a variety of high quality PVC Resin products having a wide range of end-use applications.

Besides speciality Battery Separator Resins, the company also manufactures Suspension Resins and Paste (dispersion) Resins.

Chemplast Sanmar pioneered the manufacture of Paste Grade Resins in India. It is also the only manufacturer of Battery Separator Grade Resins (made with technical know how from ICI, UK).