The Hakko FS100-01 Tip Rejuvenating / Cleaning Chemical Paste re-tins oxidized soldering iron tips and is 100% Lead-Free. The flux does not contain Diammonium phosphate and does not leave a corrosive residue. (Conforms to JIS-Z-3197 6.6.1 test method.)

For optimum performance, use the FS-100 paste in conjunction with the Hakko tip polisher for increased oxide removal.