The Kester 1800 is a neutral, water-based, non-halide, organic acid flux formulated for soldering magnet wire. 1800 is non-flammable and because water is not a volatile solvent, it is easy to control in use. 1800 is water soluble, which assures easy removal by aqueous cleaning methods after soldering. 1800 is an excellent flux for soldering copper that leaves virtually no residues at elevated temperatures. - 1800 is used for soldering magnet wire, terminals ends and electronic assemblies. The unique chemistry of 1800 allows it to remain active for a short period at very high temperatures, up to 500 °C (932 °F), to remove solderable magnet wire coatings.