Adhesive glue

You must evaluate the viscosity, tensile strength, and curing time (initial vs. full cure). For industrial applications, ensure the glue has high thermal stability and chemical resistance. If the application involves outdoor use, verify UV resistance and waterproofing capabilities to prevent bond degradation over time.

Verify that the supplier provides MSDS (Material Safety Data Sheet) or SDS. For the EU market, compliance with REACH and RoHS is mandatory. For North America, check for ASTM D-4236 (for art/office supplies) or specific VOC (Volatile Organic Compounds) emission limits to ensure the product is non-toxic and environmentally friendly.

Selection depends on the substrate compatibility (e.g., metal-to-plastic, wood-to-wood). For electronics, you need electrically conductive or insulating adhesives. For construction, heavy-duty structural adhesives are required. Always request a substrate compatibility report from the manufacturer to avoid bond failure in specific environments.

Adhesives are perishable; ensure a minimum shelf life of 12–24 months. Confirm that the supplier uses hermetic sealing and provides clear storage temperature guidelines (typically 5°C to 25°C). Ask for the production date on samples to ensure you are not receiving aged stock that has already begun polymerization.

Adhesives are often classified as Class 3 Flammable Liquids or Dangerous Goods (DG). The biggest risk is customs seizure or carrier rejection if not accompanied by a Dangerous Goods Declaration and a UN-certified packaging certificate. Ensure your freight forwarder is experienced in handling hazardous materials.

Request a Batch Inspection Report for every shipment. Negotiate a contract clause that specifies viscosity tolerance levels (e.g., ±5%). Use Made-in-China.com's Secured Trading services to hold payment until a third-party pre-shipment inspection confirms the chemical properties match your approved sample.

Since liquids are heavy and restricted, sea freight is the most economical for bulk, but requires temperature-controlled containers (Reefers) if the glue is sensitive to extreme heat or freezing. For smaller batches, use specialized DG couriers rather than standard air mail to avoid legal complications at the border.

Check the HS Code (typically Chapter 35) for specific import duties in your country. Be aware of Anti-Dumping Duties that some regions apply to specific chemical categories. Ensure the supplier provides a Certificate of Origin to take advantage of any Free Trade Agreements (FTAs) that might reduce your tariff burden.