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Marvelux, the most popular and successful bullet casting flux, has been available in the market since 1971. It is the top choice of professional and hobbyist bullet casters who value its effectiveness. Marvelux is designed to be non-corrosive to iron and steel, and it doesn't produce fumes like sal-ammoniac which can cause corrosion. If used regularly, it can keep your pot from rusting. Additionally, Marvelux significantly reduces dross formation while increasing the fluidity of bullet alloys, making it easier to obtain well-filled-out bullets. This flux is suitable for any lead alloy melt intended for casting bullets or swaging cores. Marvelux is instrumental for its non-smoking, flameless and non-smelling properties. It is a superior alternative to other grease-type fluxes such as beeswax, tallow and paraffin, and even better compared to rosin since it doesn't smell like you're burning down an old shed.