Pumax Chemicals [P] Ltd offers High Acid Resistant Isopthalic Polyester. Pumax Chemicals [P] Ltd also manufactures various types of Unsaturated Polyster Resins. The High Acid Resistant Isopthalic Polyester of Grade - Px ISO, is used in FRP Chemical Process Plants. This Resin is also used in FRP Storage Tanks and Pipes. The Isopthalic Polyester is high acid resistant with good electrical properties. The High Acid Resistant Isopthalic Polyester has higher mechanical strength of laminates.