Sapphire No-Clean Flux 30ml DCCconcepts Sapphire No-Clean flux is an ideal companion that will make it possible for you to make perfect joints easily every time in electronics soldering wires to track working on or re-working brass whitemetal or nickel silver kits U ª U U ™ U ª U U ª U U ™ U ª U In fact anywhere that later clean might be difficult to do! The ONLY time you may want to clean this flux off post-soldering is if you wish to paint the area you have soldered in that case a simple wipe over with cloth or cotton bud dipped in Isopropyl alcohol or even methylated spirits is all that is needed.