Casein Bookbinding Glue from Mexico
A traditional protein glue from casein used in bookbinding for spine adhesion and lay-flat properties in hardcover books. It qualifies for HTS 3501.90.20.00 as a casein glue, not covered by printing gelatin products in Chapter 49 per chapter notes.
Duty Rate — Mexico → United States
16%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Provide binding industry end-use letters to distinguish from general purpose glues and support classification
• Ensure no enzymatic pre-treatment additives to avoid overlap with excluded Chapter 34 products