Sparkle flux cored solder wire was first introduced in 1955. Using a high reliability manufacturing process that guarantees flux core continuity, Senju has developed a wide range of wires with diverse alloy and flux types to meet the varying requirements of specialised applications. From RMA no clean products to fully active cored wire for soldering metal with an oxidised surface film, Senju has an extensive range of flux cored wire, all characterised by their outstanding performance.