Adhesives are classified under different HTS chapters depending on their primary constituent — rubber-based adhesives fall under Chapter 40, resin-based adhesives under Chapter 35, and certain specialty formulations under Chapter 38. Getting the chemical base wrong can result in misclassification, incorrect duty assessment, and potential penalties, so a licensed customs broker or chemist review is advisable.

Many adhesive formulations imported from China are subject to Section 301 tariffs, though the specific lists and rates vary by HTS subheading. Importers should verify the applicable list for each product line before entry, as coverage has shifted across successive rounds of Section 301 actions.