The Brownells Marvelux bullet casting flux is an optimal selection for both professional and hobbyist bullet casters, significantly minimizing dross formation and improving the fluidity of bullet alloys. Since its introduction in 1971, Marvelux has been a reliable flux within the bullet casting community. Its non-corrosive properties ensure that iron and steel equipment remain rust-free and it does not emit fumes that could lead to corrosion, unlike sal-ammoniac-based fluxes. Consistent use of Marvelux maintains casting pots in a clean and rust-free condition. Furthermore, it is non-smoking, flameless and odorless, offering a safer and more pleasant casting experience. Marvelux surpasses traditional fluxes such as beeswax, tallow, paraffin and rosin, as it does not release unpleasant odors during use.

• Corrosion-resistant - engineered for compatibility with ferrous materials, ensuring protection against oxidative degradation and rust formation
• Non-corrosive emissions - this product does not release corrosive fumes, thereby providing a safer environment for casting operations
• Minimizes dross accumulation - optimizes the rheological properties of bullet alloys to improve mold fill-out efficiency
• Optimized user experience - incorporates non-smoking, flameless and odorless features to significantly enhance the casting process