Mechanic Flux Solder Paste Syringe 10ml Halogen Free UV10 The ideal flux for electrical and electronic repairs Formulated for use with tin/lead and lead-free alloys After soldering, the rosin residue is non corrosive, non conducting, moisture resistant, and fungus resistant. Compatible with lead free and leaded solder systems. For rework and touch-up of SMT, SMD, and through hole solder joint.