Export quality polyurethane sealant refers to high-end products that comply with JC/T 482-2022 (China’s latest national standard), and have passed international certifications such as REACH, ROHS, and ASTM in the United States. It has high elasticity, high strength, ultra long weather resistance, and is environmentally friendly and low VOC. Mainly used for export projects such as building curtain walls, high-speed rail tunnels, automobile manufacturing, ships, photovoltaics, etc.
1、 Core Performance Standards (Export Grade)
Execution standard: JC/T 482-2022 (replacing the old version, implemented in 2023)
Key indicators:
Tensile strength: ≥ 0.65~1.2MPa (high modulus HM ≥ 1.2, low modulus LM ≥ 0.8)
Elongation at break: ≥ 400% (high elasticity, suitable for joint displacement)
Displacement capacity: 25LM/50LM (able to withstand joint expansion of ± 25%~± 50%)
Weather resistance: Xenon lamp aging for 1000 hours (no powdering or cracking)
Environmental Protection: Low VOC, solvent-free, formaldehyde free, compliant with REACH and ROHS
Temperature range: -40 ℃~90 ℃ (stable in extreme environments)
2、 Key points for export selection
Type Selection
Single component (PU): easy to construct, suitable for on-site sealing, and most commonly used for export.
Two component (2K-PU): higher strength, faster curing, suitable for large prefabricated components/industry.
Modulus selection
Low modulus (LM): Good elasticity, suitable for dynamic joints (bridges, curtain walls).
High modulus (HM): High strength, suitable for static joints (buildings, metal plates).
Essential export certification
China: JC/T 482-2022, ISO9001, National Standard Information Public Service Platform for Environmental Protection and Ten Environmental Protection
EU: CE, REACH, ROHS
USA: ASTM C920, UL
Packaging and Logistics
Standard: 310ml aluminum tube, 400ml soft pack, 600ml sausage pack, 20L/200L drum pack
Export: Neutral packaging, English instruction manual, pallet reinforcement
3、 Typical application scenarios
Building curtain walls/doors and windows: weather resistant sealing, rainwater resistant, and wind resistant.
Highway/Bridge/Tunnel: Expansion joint sealing, displacement resistance, fatigue resistance.
Automobile/Rail Transit: Windshield Glass Adhesive, Body Sealing (Puseda 8891).
Ship/container: resistant to seawater and salt spray corrosion.
PV/new energy: sealed module, UV resistant and anti-aging.
