The 63-0002-2372 is a zero-halogen, no-clean, low solids liquid flux formulated for wave and hand soldering processes compatible with both leaded and lead-free solder alloys. It is specifically designed to withstand long dwell times and high preheat temperatures required in thick board assemblies, with sustained flux activity enabling good barrel fill in challenging applications such as reflowed copper OSP boards and difficult-to-solder components. The flux produces minimal, clear, and non-tacky residues for improved cosmetic appearance and is classified as ROL0 under IPC J-STD-004B. This product is ideal for applications requiring robust soldering performance on complex assemblies where thermal stress and component accessibility present challenges.