• High activity
• Minimizes icicling and bridging
• High ionic cleanliness and no surface insulation resistance degradation
• Classified as ORH1 per J-STD-004

Kester 2331-ZX Flux-Pen is designed for leaded and lead-free rework of conventional and surface mount circuit board assemblies. 2331-ZX Flux-Pen is an innovation in organic acid water soluble flux chemistry for soldering circuit board assemblies. This unique, neutral pH chemistry flux provides the best ionic cleanliness of any organic water soluble flux available to the electronics industry. This popular flux has been used for soldering critical assemblies in the telecommunications, computer and other industries. No offensive odors will be emitted during soldering. 2331-ZX Flux-Pen will not create excessive foaming in standard water cleaning systems. 2331-ZX Flux-Pen has good soldering properties for improved productivity without sacrificing reliability of the assembly. This flux does not attack properly cured solder masks or FR-4 epoxy-glass laminate. 2331-ZX Flux-Pen is not detrimental to the surface insulation resistance of the soldered assembly. Use of this flux minimizes cleaning costs while complying with environmental regulations.