AMTECH NC-559-ASM-TF is a no-clean tacky solder flux for leaded (Sn/Pb) applications. NC-559 is a very successful formula with many devoted consumers worldwide, a golden standard for no-clean leaded rework, stencil printing, BGA sphere attachment and reballing on all PCB surface finishes. Most popular formulation among electronics repair shops and soldering enthusiasts using no-clean process. Very well suitable for a multi-stage assemblies. Factory syringe only – dispensing kit sold separately.