Kester’s TSF-6522RH is a rosin based no-clean tacky soldering flux formula designed to be compliant with IEC 61249-2-21 definition for halide free materials.  TSF-6522RH is a formula being marketed for customers familiar with Kester’s TSF-6522 formula, but now must comply with new halide free legislation.  TSF-6522RH can be used with doctor blade, or a drum fluxer.  Kester’s TSF-6522RH can also be used in dot dispensing for BGA/PGA sites or in a rework application for surface mount packages.