The solder wire with No clean for repairing through-hole, mixed and surface mount assemblies. The flux core provides faster and better fluxing activity than RA flux core . Flux is formulated to provide clear . colorless residues , maximum activity and hight reliability without cleaning in most situations. Special Features: In response to a global call for environmentalism,Baotai has applied the most advanced technology to produce unwashable solder wire which allows fast cleaning while it is used for welding and repairing Two-phase model allows easy welding and repairing No halogens, no splash, uncorrodible, and without odor Less residue, shiny and clean solder spot