The Brownells Marvelux bullet casting flux is an excellent choice for both professional and hobbyist bullet casters, as it effectively reduces dross formation and enhances the fluidity of bullet alloys. Since its debut in 1971, Marvelux has been a trusted flux in the bullet casting community. Its non-corrosive nature ensures that iron and steel equipment remain free from rust and it does not produce fumes that could cause corrosion, unlike sal-ammoniac-based fluxes. Regular use of Marvelux keeps casting pots clean and rust-free, contributing to a more efficient casting process.

• 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