Product Overview Adhesive sealants classified under HS Code 350691 are chemically formulated compounds designed to provide durable bonding and sealing solutions across various substrates. These sealants typically exhibit viscoelastic properties with controlled tack and cure rates, ensuring optimal adhesion and flexibility. Physically, they are available in paste, gel, or liquid forms with specific viscosities ranging from 10,000 to 100,000 centipoise, and cure times adaptable to industrial processing requirements. The HS Code 350691 encompasses synthetic adhesive sealants based on polymers such as polyurethane, silicone, and acrylics, excluding natural or modified natural gums. Subcategories within this classification include single-component and multi-component systems differentiated by curing mechanisms—such as moisture-curing or heat-activated formulations. Commercially, these adhesive sealants are integral to food service packaging, retail product assembly, and industrial processing lines, providing hermetic seals, moisture barriers, and structural bonding. Their market positioning emphasizes high-performance durability, chemical resistance, and compliance with food-grade and safety standards, catering to importers and manufacturers seeking reliable, specification-compliant sealing solutions. HS Code Classification & Trade Specifications The full HS Code 350691 falls under Chapter 35 (Albuminoidal Substances; Modified Starches; Glues; Enzymes), Heading 3506 (Prepared glues and other prepared adhesives), and specifically Subheading 350691 (Adhesive sealants based on polymers). The classification is based on the product’s chemical composition and intended use as a prepared adhesive sealant, distinct from natural adhesives or unprocessed gums. Trade compliance requires adherence to packaging norms, typically involving sealed metal or plastic containers ranging from 500 ml to 25 kg, designed to prevent contamination and moisture ingress during shipping. Preservation methods include inert atmosphere packing and temperature-controlled storage to maintain product integrity, especially for moisture-sensitive formulations. Shipping must comply with international regulations for chemical substances, including proper labeling and documentation aligned with WTO Customs Valuation Agreement and the Harmonized System nomenclature. Quality standards often referenced include ISO 9001 for manufacturing and ASTM D5893 for adhesive performance, ensuring batch consistency and compliance with international trade and customs inspection protocols.