Plastic Seal

A Plastic Seal is a one-time locking device used on containers, trucks, air cargo boxes, and other transport carriers. It is usually made of high-strength plastic and has a unique number. Once locked, it cannot be opened without damage, ensuring that goods have not been tampered with or stolen during transit. In foreign trade, it is often used together with documents such as bills of lading and packing lists, and is an important proof for cargo handover and customs inspection. Usage scenarios include: the exporter applies the seal after loading the container and records the number, and the consignee checks integrity against the number; carriers, customs, or insurers also rely on the seal to determine liability. Precautions: the seal number must match documents such as the bill of lading. If it is damaged or the number does not match, take photos immediately and notify relevant parties; plastic seals are weaker than metal seals, so for high-value goods it is recommended to use metal seals or add electronic seals. Compared with a Lead Seal, a plastic seal is lower in cost and easier to use, but has weaker tamper resistance; compared with an E-Seal, a plastic seal has no real-time tracking function. Foreign trade practitioners should understand the applicable scenarios and contract requirements of different seals to avoid claims or customs clearance delays caused by seal issues.