Chempol 211-2940 Polyester CCP Online Polyester Coil Coating >> Back coating Chempol® 206-2940 is polyester for coil backer. It is used in structural steel coatings, aluminium coatings, appliance coatings and metal office furniture. Polyester for coil backer. Used in structural steel coatings, aluminium coatings, appliance coatings.