The Qualitek 50-4002 Paste Flux is a 2 oz. container of electronic quality rosin flux mixed with petroleum jelly. Same as Kester SP-44(83-0000-0144).
This flux is not flammable, cannot spill and is non-corrosive (no acid) .
Type PF400 Recommended for electrical or electronic soldering applications. After soldering, the flux residue can be removed by wiping with a cloth or with solvent cleaning.