Blue Demon E71T-11 x .035 x 1LB Spool Gasless Flux Core Welding Wire This product does not require a shielding gas and can be used in a limited multi-pass welding operations The bead appearance is not equal to a gas shielded product but the benefits of not having to use gas make this product popular Typical applications include assembly and maintenance welding, machine parts, tanks, prefab construction, railroad car repair