Studio Pro Safety Flux is designed for copper foil projects, and is a non-acid, non-greasy, environmentally-friendly flux that easily washes off with soap and water up to 14 days after soldering...

Old Master's is an "instructor trusted" all-purpose liquid flux for soldering copper foil and lead came. Made by Novacan, it is specifically designed for the stained glass industry. 8 ounce bottle.

Novacan Copper Patina gives a copper finish to solder. Premixed and ready to use. Sold by 8 ounce bottle.   Use and surface preparation: