RA is a fully activated, general-purpose wire solder for use in applications where mildly activated fluxes are too weak. RA cored wire is strong enough for excellent tarnish and oxide removal, and will produce bright shiny solder joints. RA wire will leave slight to moderate post process residues that may be left on noncritical applications, but should be removed from any critical applications. RA cored wire meets Mil-Spec cleanliness requirements post-cleaning. IPC flux classification for this material is ROM1.