Thermal Insulated Cork Wall Liners from Mexico
Thin natural cork liners backed with paper for thermal regulation behind wall finishes in energy-efficient buildings. Covered by HTS 4503.90.40.00 as reinforced wallcoverings of natural cork. The paper allows for stapling or gluing directly to wall studs.
Duty Rate — Mexico → United States
10%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Obtain R-value certifications to support insulation claims without shifting to Chapter 68 building materials
• Ensure 'wallcovering' intent in commercial docs; construction use may trigger different rulings
• Test for mold resistance in humid climates, as CBP may inspect for agricultural risks