Achieve strong and dependable soldered joints with Griffon S-39 Universal soldering fluid. This universal, acid-free flux is designed for soft soldering virtually all metals such as copper, brass, and zinc with solid tin solder, excluding aluminium. Its powerful cleaning action removes and prevents surface oxidation, ensuring optimal solder flow and adhesion at working temperatures up to 375 °C. The handy brush integrated into the cap of the 320 ml bottle allows you to apply the liquid evenly and accurately onto the joint surfaces. Once your soldering work is completed, flux residues can be wiped away easily with water or a damp cloth.