The Indium Solder FLUXWV-84471-5G is a rosin wave solder flux. WF-9940 is Indium Corporation’s most active and heat-stable low-solids rosin-containing no-clean wave solder flux. WF-9940 was developed to meet the original requirements of J-STD-004 as a ROL0 and for effectively soldering through-hole and mixed-technology assemblies. It performs well with both tin-lead and lead-free solders. WF-9940 is very heat-stable and well-suited for selective soldering applications. With strong soldering performance, WF-9940 passes all common reliability requirements. It is non-corrosive and does not contribute to detrimental circuit board insulation resistance degradation or electrochemical migration.