31/07/2024
Using container seals: A guide to greater security and efficiency in freight transport
The world of freight transport is complex and often unpredictable. Amid the numerous challenges companies face every day, ensuring the security of transported goods is a top priority . Container seals play a crucial role in this. In this cargo securing blog post, you'll learn everything you need to know about the use of container seals , their benefits, and how they can improve safety and efficiency in freight transport .
What are container seals?
Container seals , also known as container locks or security seals , are devices used to securely close container doors . They serve not only to secure containers during transport but also to prevent tampering and ensure the integrity of the cargo . These seals are made of robust materials such as steel or plastic and are available in various shapes and sizes to meet different requirements .
Why are container seals important?
- Cargo security : Container seals provide a first line of defense against theft and tampering. They significantly impede unauthorized access to containers and make it clearly visible if there is an attempt to remove or tamper with the seal.
- Traceability : Our container seals are equipped with individual serial numbers that enable easy tracking and documentation. This facilitates supply chain monitoring and helps quickly identify tampering attempts.
Types of container seals
- Bolt seals : Bolt seals are robust metal seals commonly used in international freight transport. They consist of a metal bolt and a cylinder that click together, providing a high level of security.
- Cable seals : These seals consist of a metal cable secured by a locking mechanism. Cable seals are flexible and well-suited for containers with irregular closures.
Application of container seals: step-by-step instructions
- Preparation : Before applying a container seal, ensure the container is properly closed. Check the door locks and ensure there is no obvious damage or tampering.
- Choosing the Right Seal : Select the seal that best suits your needs, taking into account factors such as the value of the cargo, the transport distance, and security requirements.
- Applying the seal : Thread the seal through the designated locking points on the container. For bolt seals, insert the bolt through the locking eyes and secure it with the cylinder. For cable seals, thread the cable through the openings and lock it with the mechanism.
- Documentation : Record the seal's serial number or barcode and document this information on the consignment note or transport documents. This allows for tracking and verification during transport.
- Inspection and removal : Upon arrival at the destination, check the seal for damage. Remove the seal using the appropriate tool when the container is unloaded and document any abnormalities.
Container security seal, High Security Seal HSS (with sticker)
From
€0.94*
Our High Security Seal (HSS) container security seal offers maximum protection for your cargo. This high-security seal is ideal for use on containers and ensures reliable sealing against unauthorized opening. It comes with a user-friendly sticker that allows for easy identification and tracking of the sequential number. Our container seals are "H" (ISO/PAS 17712:2013) standardized and C-TPAT compliant. The seals are each 87 mm long and have an 8 mm bolt diameter. Trust the HSS seal for maximum security and integrity of your transports . Technical data of the High Security Seals Type : High Security Seal (HSS) – High security seal with sticker Total length : 87mm Bolt diameter : 8mm Material : Hardened steel, plastic coating Standards & Certificates : ISO/PAS 17712:2013 (H), C-TPAT compliant Marking : Consecutively numbered + additional sticker Use : Disposable seal, only to be opened by destructive means Advantages of the container security seal ✅ Maximum security : Tamper protection through stable high-security seal ✅ Unique identification : combination of consecutive number and sticker ✅ Quick application : Easy to apply without special tools ✅ Internationally applicable : Certified according to ISO/PAS 17712:2013, C-TPAT compliant ✅ Flexible use : As a container seal for sea containers, trucks, rail freight and warehouses Areas of application of security seals Sandax security seals are universally applicable and are used primarily in the following areas: Container transport in international sea freight Truck and rail transport Swap bodies in road freight transport Storage and depot sealing High security seals ( export packaging ) are mandatory , especially for exports to North America and Asia . Therefore, anyone looking to purchase container seals should look for certified and C-TPAT-compliant products . Conclusion With Sandax container seals with stickers, you're relying on a tested and internationally recognized solution for securing cargo . Whether for sea, rail, or road transport – this high-security seal ensures maximum control and security .
Steel cable seal, diameter 2.5 mm, 300 mm wire length
From
€1.78*
The steel cable seal, with its 2.5 mm thick steel cable and 300 mm length, is a flexible security tool for protecting containers, truck trailers, tanks, trucks, airline cars, rail cars , and other transport containers. The Security Seal's sturdy aluminum body, available in bright green or blue (depending on availability), is ideal for visual inspection , making tampering easily detectable . The sequential numbering of the adjustable pull-through seals is also a helpful security feature for export packaging . Product details & technical data Diameter steel cable : 2.5 mm Wire length : 300 mm Body material : aluminum – lightweight, rust-resistant Color options : Green or Blue (various availability) Numbering : Continuously laser engraved on metal body Applications : Containers, trucks, trailers, tanks, airline cars Packaging unit (VE) : 1,000 pieces per carton Your benefits at a glance ✅ Steel cable seals are extremely versatile - can be used flexibly even for irregular openings ✅ Flexible 300 mm cable – ideal for large or atypical openings in liquid or tank transport ✅ Unique, unique security – visibly destroyed upon removal, ideal for tamper protection ✅ Highly visible color – quick visual inspection thanks to bright colors ✅ Economical and practical – weatherproof, stable and lightweight Areas of application of steel cable seals Container & Sea Transport : Ideal for securing door locks against unauthorized opening Road & rail transport : Suitable for truck trailers and tankers – cables can be flexibly guided through eyelets Air freight & logistics : Flexible length and compact design for airline trolleys or aircraft doors Industrial containers : Enables easy, secure sealing when transporting liquids or powders Easy application of the adjustable pull-through seals Insertion : Lead the cable of the seal through the provided openings Closing : Insert the cable end into the aluminum body – mechanically locked Control : Compare and document the number on the body Unsealing : Break open the cable, remove the seal – manipulation is immediately detectable
Container seals - security seal, High Security Seal HSS
From
€0.94*
The High Security Seal (HSS) container seal from Sandax offers maximum security and tamper protection for your container transport . Certified according to ISO 17712:2013, it meets the highest international security standards and guarantees reliable protection of your valuable cargo during transport by road, rail, and sea . The unit of our container seals is 10 pieces each, there are 250 seals in a carton and 20,000 seals on a pallet. The two-part Sandax container security seal is made of galvanized steel and ABS plastic . It is sequentially numbered and complies with ISO/PAS 17712:2013 , C-TPAT compliant , features an anti-rotation design, 8mm steel diameter, and 87mm length. Custom laser engraving is available upon request and for orders of 1,000 or more . Product details at a glance: Material : High-quality steel with robust plastic coating Color : Standard yellow for high visibility (other colors on request) Certification : ISO 17712:2013 “H” (High Security) – recognized by customs authorities worldwide Tamper protection : Single use, irreversible and not reusable Marking : Unique serial number for easy traceability and documentation Easy handling : Quick and tool-free installation for efficient work Technical data for our container seals: Seal type : Container seal/bolt seal Material : steel bolt with ABS plastic housing Total length : 87mm Bolt diameter : 8mm Color : yellow Labeling : consecutive numbering (identical on both seal parts) Approvals : ISO 17712:2013 (E) / C-TPAT – 'H' compliant High Security Seal, EU Regulation 2454/93, Article 386, Annex 46A, HM Revenue & Customs High Barrier Class 1, US In-Bond Security Why choose Sandax container seals? ✅ Reliable protection – The HSS seal effectively prevents unnoticed tampering and protects your goods from theft and unauthorized access. ✅ International Recognition – Accepted by international customs authorities, ideal for worldwide export and import. ✅ Easy to use – Installation in seconds without additional tools, reduces working time and costs. ✅ Secure documentation – The unique serial number ensures complete documentation for your safety and quality management systems. ✅ High visibility – The eye-catching coloring allows for quick visual inspection of the integrity during incoming goods and customs clearance. Sandax container seals are ideal for: Container transport (sea containers, rail containers, trucks) Air freight and forwarding logistics Dangerous goods transport Customs clearance and international cargo security Protection of storage and storage containers Important NOTE :
The container seals are intended for single use. Once opened or removed, they are no longer usable, allowing tampering to be reliably detected. Rely on proven quality and the highest security standards – with Sandax’s High Security Seals (HSS), your shipments are optimally protected. Any questions or individual requests ?
Contact our customer service – we will be happy to advise you on larger quantities, special color requests, or individual requirements. Order now and seal your containers securely !
Steel cable seal High Security Seal, 3.5mm wire
From
€1.90*
Wire length : 300 mm Wire : 3.5mm Color : blue consecutive number range
Steel cable seal according to ISO 17712/2013
Unit=500 pieces Customs tariff number: 83099090
Conclusion: Apply container seals correctly
The use of container seals is an essential component of security measures in freight transport . They provide protection against theft and tampering , ensure regulatory compliance, and improve supply chain efficiency . By selecting the right seal and applying it correctly, companies can significantly increase the security of their cargo and ensure smooth transport operations.
Invest in high-quality container seals and train your employees on their use to achieve the best possible results. In a world where security and efficiency are critical, container seals are an indispensable tool .
FAQ – Container seals: application, safety and practice
How do I correctly apply a container seal?
To correctly apply a container seal, proceed as follows:
Ensure the container is properly sealed and no tampering is visible. Thread the seal through the locking eyelets on the container door—usually on the right-hand door, as this is the last one to be opened. For bolt seals, insert the bolt through the eyelets and lock it with the cylinder until you hear a click. Record the seal's serial number in the consignment note for your records.
What is the difference between a container seal and a container seal?
Container seals and container seals are terms for security devices attached to containers to prevent tampering and unauthorized opening. While seals are usually made of metal or plastic and are certified as high-security seals, "container seal" often refers to the same product – the key is correct and visible application.
How do you open a container seal?
Opening a container seal requires a special tool, usually bolt cutters. The seal is designed for single use and cannot be reused once removed. For pull-through seals, side cutters are often sufficient. After opening, the serial number should be checked against the transport documents to rule out tampering.
How do I apply a pull-through seal and how do I open it?
Pull-through seals are inserted through the designated openings and tightened until they are securely in place. Side cutters or special pliers are usually sufficient to open them. Documenting the serial number is also important here.
Who is responsible for sealing a container?
Sealing a container is generally the responsibility of the shipper or the contracted freight forwarder. They must ensure that the seal is properly applied and the serial number is documented. For international shipments, customs authorities may also perform the sealing.
Are there instructions on how to properly seal a container?
Yes, a sealing guide includes the following steps:
- Checking the condition of the container
- Selecting the right seal Attach the seal to the designated location (usually the right door)
- Documentation of the serial number
- Verification of integrity upon arrival at the destination
What is particularly important when sealing a container?
Make sure the seal is firmly in place and cannot be removed without tools. The serial number must be clearly legible and documented. This is the only way to ensure complete protection against tampering.
How can I ensure that I seal the container correctly?
Use only certified high-security seals according to ISO 17712:2013. Train your staff regularly and check the seals for damage and correct numbering before each departure.
What to do if a container seal cannot be opened?
If a container seal cannot be opened, use suitable bolt cutters. If problems occur, the on-site logistics staff will usually be able to help. Never attempt to remove the seal with unsuitable tools to avoid injury and damage to the container.
(Last update of this article: July 5, 2025)