Flux & Brush

Flux is needed to solder seams. I use various fluxes, but for the Apprentibox boxes, it is an Acro flux, which can be diluted before use. 

This 4oz bottle comes half-filled with Acro flux so you can add water. It is normal for it to warm up when you add water, but that only happens once. You will also receive a brush. 

This comes in all Apprentibox boxes, but if you need more, this will be helpful!