Chemtronics CircuitWorks CW8100 No Clean Flux Dispensing Pen, 9ml Applies a patented noncorrosive, halide free, organic no-clean flux Flux meets bellcore contoured-n-nwt-000078 and ipc sf-818 for surface insulation resistance Flux meets ansi/ipc j-std-004, type Rol0 Chisel tip marker provides exact i of flux to surface