3506.99.00.00 - Other

HTS code 3506.99.00.00 encompasses "other" prepared glues and adhesives that do not fit into the more specific categories within heading 3506. This includes a broad range of adhesive preparations not elsewhere specified or included, provided they are not specifically classified under subheading 3506.91. The classification here is for those adhesives that are not primarily based on polymers of headings 3901 to 3913 or on rubber.

This "Other" category is distinct from its sibling, 3506.91, which specifically covers adhesives formulated with polymers or rubber. Therefore, to classify an adhesive under 3506.99.00.00, it is crucial to first confirm that it is not primarily composed of materials listed in the polymer or rubber categories. The focus is on adhesive preparations that utilize different binding agents or formulations.

As a leaf node, 3506.99.00.00 does not have further subdivisions. Consequently, classification within this category relies heavily on the exclusion principle – if an adhesive meets the general description of prepared glue or adhesive and is not specifically covered by any other HTS subheading, it will fall under this residual classification. Examples could include certain casein-based glues, starch-based adhesives not classified as modified starches elsewhere, or complex formulations where the primary adhesive component is not a polymer or rubber as defined in 3506.91.