Kester NF1060-VF is a zero-halogen wave soldering flux with minuscule, non-visible residue is non-conductive, non-corrosive, and does not need to be removed. - Kester NF1060-VF is a new addition to Kester�s No-Clean, VOC-Free product line. Kester NF1060-VF is zero-halogen (none intentionally added) wave soldering flux that maintains its soldering performance achieving excellent through-hole fill and lowdefect soldering of lead-free electronic circuit board assemblies.