Epoxy glue

Buyers must evaluate the viscosity (measured in cps) to ensure it matches the application method, whether it be pouring or precision injection. The mixing ratio (commonly 1:1 or 2:1 by volume) is critical for chemical stability. Additionally, verify the pot life (working time) and full cure time to align with production schedules. For high-performance needs, prioritize epoxies with high tensile strength and lap shear strength (measured in MPa or PSI).

It is mandatory to request a Material Safety Data Sheet (MSDS) or Safety Data Sheet (SDS) to understand chemical hazards. For products exported to the EU, ensure REACH and RoHS compliance to certify the absence of restricted hazardous substances. If the glue is used in food-contact items or medical devices, verify FDA or ISO 10993 certifications respectively. Always check for VOC (Volatile Organic Compounds) levels to meet environmental regulations.

The choice depends heavily on the environment: UV-resistant formulations are essential for outdoor applications to prevent yellowing and degradation. For electronics, thermally conductive but electrically insulating epoxies are required for potting. If the application involves high-heat environments, ensure the Glass Transition Temperature (Tg) is higher than the maximum operating temperature to prevent softening.

Request third-party lab reports focusing on aging tests and humidity resistance. Since epoxy has a limited shelf life (typically 6–12 months), ask the supplier for the production date and storage requirements (e.g., temperature-controlled environments). Ordering a pre-shipment sample to test the bonding strength on your specific substrate is the most effective way to prevent large-scale failures.

Epoxy glue is often classified as Class 9 Dangerous Goods or 'Liquid' depending on its flashpoint and chemical composition. You must ensure the supplier provides a Certification for Safe Transport of Chemical Goods. For sea freight, use UN-rated packaging to prevent leakage. It is highly recommended to consult with freight forwarders on Made-in-China.com who specialize in chemical logistics to navigate complex customs declarations.

Utilize Trade Assurance services to protect your payment until delivery is confirmed. Conduct a factory audit or request a video inspection to verify the supplier's production capacity and R&D lab facilities. Avoid suppliers who cannot provide a Certificate of Analysis (COA) for each batch, as consistency is the biggest risk in chemical sourcing.

Prices are heavily influenced by the cost of raw epoxy resin and hardeners. Negotiate based on volume tiers; for example, purchasing in IBC drums or 200L barrels instead of small bottles can reduce costs by 15-25%. Discuss long-term supply contracts to hedge against price fluctuations in the petroleum-based chemical market.

Be aware of anti-dumping duties that some countries may impose on chemical products from specific regions. Ensure the HS Code (typically 350691) is correctly declared to avoid customs delays or incorrect tariff applications. Always clarify Incoterms (e.g., CIF vs. FOB); for chemicals, FOB is often preferred by experienced buyers to maintain control over the specialized shipping process.