2 LBS - 1/8" Vulcan NastyCast Cast Iron Repair Electrodes Premium Electrode used for repairing cast iron. Deposits have a close color match to cast iron. Contains special fluxing agents for welding dirty, oily, nasty, contaminated cast iron. Better than other rods at welding contaminated castings. Joins problem cast iron to steel; welds cracked machine bases, housings, and builds up worn areas.