Soldering fluxes for stencil printing IF 8300 Low residue tacky gel flux Interflux® IF 8300 is a no-clean, halide-free tacky gel flux suitable for reballing and BGA rework. IF 7500 HAB Large process window tacky gel flux Interflux® IF 7500HAB is a no-clean, halide-free tacky gel flux with increased process window. Suitable for reballing and BGA rework.