Quickflux is a liquid Kolophonium Flux in a bottle with brush. Solid content 3 – 15 %, solvent content 85 – 97 %.
When applying any type of flux, apply as little flux as possible because the residues can be corrosive, conductive, and sticky. This bottle, however, contains very mild flux that is not corrosive or conductive. It also comes with a brush attached to the cap for easy application. We recommend the use of a flux dispensing bottle with a small needle or a flux pen to help limit the amount of flux that is applied. cleaning: This particular flux is extremely mild, non-corrosive and non-conductive, but leaves a sticky residue that may attract dust over time.
If you decide to clean the residues (largely unnecessary), use alcohol, an ESD safe brush, and then a lint-free cloth to actually remove the residues from the board–don’t just move them around with the brush. The residues harden quickly after soldering, so clean shortly after applying solder.