Phosphoric Acid 75% - 1 Quart Bottle (32 fl oz.) - Technical Grade - High-Quality phosphoric Acid Suitable for Various Industrial Applications

50/50 ratio with distilled water works great as rust preventative when storing bare metal.

Fresh H3PO4 package as described.

to stop rusting on my building. It worked great. BUT you shipped me 6 bottles instead of 2. How do i return 4 bottles and get my money back? WTF ? Please help