Tamper-Evident Security Seals

Tamper-evident security seals work by locking in place with a mechanism that can't be reset once broken, whether that's a pull-tight strap that ratchets tighter and can't loosen, or a bolt or cable seal that must be physically cut to remove. This one-way mechanism is what makes a tamper-evident security seal show damage rather than simply come undone.

Choosing a tamper-evident security seal depends on the security level and opening size involved: steel bolt seals and aluminum cable seals suit high-security shipping containers and trailers, while adjustable plastic pull-tight seals suit totes, cabinets, and lighter-duty openings. Sizing and security needs both factor into which seal type fits a shipment.

A tamper-evident seal is designed to show visible proof after someone attempts to open it, such as a cut cable or a broken bolt, while "tamper-proof" implies a seal can't be defeated at all, which isn't realistic for any physical security seal. Tamper-evident security seals focus on detection and evidence rather than making tampering impossible.

Steel bolt seals and aluminum cable seals are the tamper-evident security seals suited to cargo containers and trailers, both certified under ISO 17712, the international standard for high-security mechanical freight seals.

ISO 17712 is the international standard for high-security mechanical freight seals, classifying seals into three levels: Indicative (I), Security (S), and High Security (H). Our bolt seals and cable seals are ISO 17712 certified; check the seal's test certificate for its specific class before relying on it for a shipment with strict security requirements.

Tamper-evident security seals give a supply chain a visible chain-of-custody layer, since anyone handling a shipment can see immediately whether a container, trailer, or tote was opened before reaching them. This visibility supports accountability across shipping, receiving, and warehouse handoffs.

No, tamper-evident security seals are single-use and disposable by design; a pull-tight seal's strap must be cut to remove it, and a bolt or cable seal must be cut with bolt or cable cutters. None can be reapplied or reset once removed.

Yes, We offer a sample request so you can check a seal's fit and strength against your application before placing a larger order.