... , alkali2) Chemicals: acids, alkalis, fertilizer, PVC and other polymers, dyestuff, insecticide pesticide3) Metals: aluminum, barium, rare metals4) High temperature applications: asphalt ... , alkali2) Chemicals: acids, alkalis, fertilizer, PVC and other polymers, dyestuff, insecticide pesticide3) Metals: aluminum, barium, rare metals4) High temperature applications: asphalt ...