
Types of Solder Flux - Lifewire
26/6/2020· For many appliions, the flux included in the core of the solder wire is sufficient. However, additional flux is beneficial in some scenarios, such as surface-mount soldering and desoldering. In all cases, the best flux to use is the least acidic (least aggressive) flux that will work on the oxide on the components and result in a good solder bond.