CL-Flux (Kester 979) No Clean Liquid Flux
2 Ounce Bottle with Flip Top Dropper
This flux is designed to be used on the solder slug pellets to facilitate the flow of solder around the copper strands. Simply put a few drops onto the strands before inserting into the melted solder to ensure good flow and  a good bond with the battery cable connector.
The CL-Flux is
Kester 979 which is a VOC-free, no-clean flux formulation for high quality, low-defect soldering of electronic circuit board assemblies. This flux\?s finely tuned activation system offers the best wetting available in VOC-free liquid flux technology and the shiniest solder joints. 979 also reduces micro solderballing on glossy laminates and between connector pins. 979 will not attack properly cured solder masks or FR-4 Epoxy-Glass laminate. 979 leaves a minimal amount of residue after soldering. All remaining residues are non-corrosive, non-conductive and do not need to be removed.
The images in this listing include the specifications from Kester on the 979 Flux