Flux for Brazing Alloys from Mexico
Chloride-free boric acid-borate mixture for high-temperature brazing of copper alloys. 3824.99.93 covers this soldering preparation not specified elsewhere. Removes oxides during joining.
Duty Rate — Mexico → United States
15%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Distinguish from 3810 fluxes by temperature/use
• pH and residue analysis for CBP
• Bulk vs retail packaging affects subheading