Lthonig high quality flux 7 5g lthonig 811114 89 p high quality flux 7 5g from l 246 thonig is ideal for exceptionally clean reliable soldering without damage to materials p p the use of solder paste can accelerate the soldering process while the flux can also be used with metals that are difficult to solder brass steel konstantan and oxidised parts p lthonig 811114 89 high quality flux 7 5g