Kester SELECT-10™ is a zero-halogen, no-clean liquid flux designed specifically for the needs of the selective soldering process. Sustained activity within the flux allows for good barrel fill in challenging applications, such as reflowed copper OSP boards or with difficult to solder components. Specific to selective soldering, SELECT-10™ does not spread beyond the spray pattern and will not clog the fluxer head. SELECT-10™ residues are non-tacky for improved cosmetics. SELECT-10™ is classified as ROL0 flux under IPC J-STD-004B.