Adhesives Based on Polymers or Rubber

The line is specifically reserved for optically clear adhesives used in the manufacture of flat panel displays or touch-screen panels. The adhesive must be formulated to meet optical clarity standards (typically defined by haze and transmittance specifications) and must be commercially presented for that end use. General-purpose transparent adhesives that do not meet display-industry optical specifications would fall into the NESOI line 3506915000.

For adhesives classified under 3506.91, USMCA origin requires that the product meet the applicable tariff-shift rule or regional value content threshold set out in the agreement's Annex. The importer must retain a certification of origin from the producer or exporter and be prepared to provide it to CBP upon request. Given that many adhesive formulations incorporate chemical inputs from multiple countries, a detailed bill of materials is often necessary to support the origin determination.