Oerlikon Fluxofil 25 description: FLUXOFIL 25 is a seamless copper coated rutile flux cored wire with a fast-freezing slag, suitable for the welding of creep resistant boiler and pipe steels, for operating temperatures up to 530C, as well as fine grain structural steels. Due to its easily controllable weld pool, it features outstanding welding properties in all positions. Low spatter loss, finely rippled welds without undercut.