National products manufactures a range of quality and high performance solders, fluxes and pcb chemicals used in electronics, instrumentation, automobiles, telecommunication, computer and other allied industries. National products offers no clean solder wire. The post solder residues are non-corrosive. Solder wire contains flux between 0.7 to 1.5% [by wt.] which is homogeneous and uniformly distributed throughout the longitudinal axis. Flux is halide free and leaves little residues which are non-corrosive and therefore cleaning the assembly.