Convenient and economical to use applied easily by brush swab or spray to cold surfaces and then heated to melt the solder and make the joints only a thin coat is needed and as the solder and flux are both applied at once it saves time used in a myriad of industrial jointing applications and a firm favourite with modellers fryolux is a uniform mixture of finely powdered tinlead solder and zinc chloride activated flux it has a creamy consistency and is reported to be ideal for pre tinning solder