Everything you need to know about the tamper evident security seal
Security seals serve a critical function. This guide will take you through their purpose, give you a general idea of how to use them, explain how they’re classified and even show you some of the different types available. You’ll find it easy to determine what types of tamper evident security seals you should be looking at for your application. If you have any questions about tamper evident seals, feel free to reach out for expert advice.
In this guide we'll cover:
What is a tamper evident security seal?
How to use a tamper evident security seal
How to select the right seal
Security seal types - including a comprehensive list of tamper evident seal types and features
What is a tamper evident security seal?
The principal reason for using tamper evident seals is to ensure the integrity of the package or item that the seal is affixed to. They provide visual evidence of any attempt to open, change, or manipulate that package. Tamper evident seals help prevent counterfeiting and unauthorized changes by making it difficult to alter or duplicate the seal without detection. Ultimately, it discourages unauthorized opening or tampering and adds an extra layer of security to combat fraudulent activities.
Even a premier tamper evident seal is not a lock. Instead, the seal is typically designed to be used only once before being destroyed. If a tamper evident security seal indicates that someone has attempted to open or change any packages, you can start an investigation to catch the violator, whether you discover the attempt or the recipients do. Tamper evident seals are often part of a larger security system, working together with other measures to ensure integrity throughout the supply chain.
They come in different types and sizes, including smaller options for specific applications. You can even get a custom tamper evident seal printed with your logo or designed to meet your specific needs. A tamper evident feature varies according to the type. Some have tampering indicators such as perforations or frangible materials that break or tear when the package is opened, and some are designed with edges that show visible signs of tampering. Others have special adhesives that leave a residue or other visible evidence if the seal is removed. Still others use high-strength metals and require special tools to remove. Manufacturers often add unique features, such as numbering or serial numbers, to facilitate tracking, authenticity verification, and enhance security.
How to use tamper evident security seals
It’s a straightforward process that generally involves applying the seal to a package or product in a specific way to ensure its effectiveness. It is important to follow the correct order of steps when applying a tamper evident seal, as this ensures the seal works as intended and cannot be bypassed. Security seals can be added to individual items or entire lots, such as multiple packages grouped together for shipments.
How a security seal is used depends on the type, but here are the general steps for using one. Tamper evident seals are needed in logistics to secure shipments and prevent unauthorized changes to items during transportation. When monitoring for tampering, these seals are part of a broader system for tracking and ensuring the integrity of items throughout logistics operations.
1. Apply the seal
To apply the seal, first make sure the surface of the item you’ll be sealing is clean and dry. Choose a seal size that fits your item—seals are available in various sizes, including smaller options for compact items and larger ones for bigger packages. When positioning the seal, ensure it covers the edge of the opening or access point to provide clear evidence of tampering if the edge is lifted or broken. Press down firmly on the seal to activate any adhesive or locking mechanisms that are part of the seal. Some seals may require you to peel off a protective backing or other layer before applying.
2. Check the seal
Once the seal is applied, check to make sure it is securely in place and that any locking mechanisms have engaged. Verify that the seal is intact and that there are no signs of tampering, damage, or any change or alteration to the seal, as these can indicate tampering. Some seals may have additional features, such as unique identifiers or serial numbering, that can be used to verify authenticity and facilitate tracking.
3. Monitor the seal
Keep an eye on the seal over time to ensure that it remains intact and that there is no visible evidence of tampering or damage. Monitoring seals is especially important in logistics, where securing shipments and lots of items is critical. Using a system to track seal integrity over time helps detect unauthorized access and maintain security throughout the supply chain. If you notice any issues or concerns, take appropriate action to investigate and address them.
It’s important to follow the instructions provided with the specific security seal you’re using.
How to select the right seal
Consider your requirements and the features necessary to what you want to achieve. Ensure the seal you select meets your specific requirements. This will include multiple factors, such as:
Certain features may be needed for compliance or security. When evaluating options, note that manufacturers often offer custom sizes and designs to suit different applications. Before placing an order, check the manufacturer's stock and product list to confirm availability. When reviewing specifications, always consider the terms and conditions related to the seal's use.
Type of seal
Weigh the different types of security seals against each other, including labels, tapes, bags, and other forms, such as tamper evident seal stickers. Seals are available in a range of sizes and can be custom designed by the manufacturer to suit the specific needs of your lot or item. Be sure to check stock availability for the particular type of seal required for your application. This will involve consideration of your industry. A tamper evident seal for food isn’t necessarily the best choice for tamper evident seals on foley catheters.
Level of security
You have several choices here, as you’ll see below. If you need a high level of security to meet the requirements needed to prevent counterfeiting, consider a bolt seal. Another way to go is with a seal that allows you to add customized information, such as a serialization tamper evident seal. Serialization, which involves unique numbering or sequential numbering, is a critical part of supply chain security initiatives. A unique serial number is assigned to each package, and this numbering helps prevent counterfeiting and supports tracking within a security system. This number is then recorded in a database, allowing manufacturers and consumers to track the package throughout its lifecycle.
Industry requirements
Does your industry have specific requirements for this range? For example, international freight transports often demand ISO 17712 certified high-security seal. U.S. regulations require tamper-resistant packaging to ensure the integrity of pharmaceutical packaging.
It is essential that tamper-evident seals meet the needed terms and standards set by manufacturers and regulatory bodies to ensure security throughout logistics and shipments. This includes compliance with industry-specific requirements for each order or lot, helping to prevent unauthorized access and maintain the integrity of products during distribution.
Material
Tamper-evident seals can be made from plastic, metal, or paper. Manufacturers offer these seals in various sizes, including smaller options, to suit different items and applications. Consider which material and size are best suited for your application, based on factors such as durability, environmental conditions, and the type of package you’re sealing.
Application method
Application methods vary according to the type of tamper-evident seals you're using, from self-adhesive to bolting. Consider which method best suits your needs – do you want ease of applying the seal? Do you want it easily removed? Or is the application method not so much a priority as the security that the seal provides? These are points that only you can decide by balancing them against other considerations.
Cost
A tamper evident security seal can vary in cost, depending on the type, material, and features. Before you buy, check the product list for current prices and review stock availability to ensure the item is in supply. Consider where to buy tamper evident seals for the best value, and place your order accordingly. Make sure the seal you choose is effective for your needs and fits your budget.
Overall, selecting the right seal requires careful consideration of your specific needs and the level of security you require. By choosing the right one, you can help to ensure the safety, integrity, and authenticity of your packages.
Security seal types
The International Organization for Standardization ISO 17712 classifies three types of security seals: Indicative, Security, and High. Some security seals are specifically designed for use on medical lines, such as central vascular lines and intravenous drug lines, or for application along packaging lines to ensure tamper-evidence on containers. Numbering, including unique serial numbers and sequential numbering, is a key feature in many security seal types to facilitate tracking, authenticity verification, and tamper detection.
Indicative seals
Class “I” indicative seals have a low breaking strength and are easily broken by hand or by using a simple snipping tool or shear. Most indicative seals are one-piece, and their edges are specifically designed to show visible signs of tampering if the seal is opened or altered. Indicative seals are available in various sizes, including smaller options, to fit different items and applications.
This plastic seal is specially designed for applications that require a very slim seal. The padlock seal has an all-plastic design with an acetal jaw-locking mechanism. Easy and convenient, single-handed application. These are available in blue, green, orange, red, white and yellow, and come in different sizes to suit a range of items.
Use for: Utility box meters, security documents and securing in-flight trolleys, ATM cassettes and other cart applications. Also suitable for banking and cash-in transit.
Tamper evident label made of polyester is easily applied as a tamper-evident tape. The matte surface is suitable for writing and provided in die-cut pieces. Option available that doesn’t leave behind residue. Another option: a tamper evident label that provides visual evidence by leaving a ‘VOID’ message to alert you to tampering. The edges of these labels are designed to reveal any attempt to remove or alter the item.
Use for: Confidential documents and containers, gaming security, restricted medical packaging, computer and information technology products.
Pull tight seals – smooth strap
Easy to apply and tighten to a desired diameter. Several seal types are available, including those with longer tags and with a tear-off tab for quick and easy removal. These seals have a polypropylene strap with a stainless-steel locking jaw and are also available with a barbed strap.
JawLock is a versatile seal designed for small strap diameters, making it ideal for securing items with a small aperture. The thin round and smooth strap has side tear-off functionality and includes a full-size tag with ample surface for codings.
SegurLock and SmoothLock are user-friendly options featuring smooth straps with gripping prongs on the stem.
TeraLock provides high-break strength with a stainless steel locking jaw and heat weld cap that helps enhance security.
JawLock is a versatile seal designed for small strap diameters, making it ideal for securing items with a small aperture. The thin round and smooth strap has side tear-off functionality and includes a full-size tag with ample surface for codings. SegurLock and SmoothLock are user-friendly options featuring smooth straps with gripping prongs on the stem. TeraLock provides high-break strength with a stainless steel locking jaw and heat weld cap that helps enhance security.
| Mini JawLock | Maxi JawLock | SegurLock | SmoothLock | TeraLock | |
|---|---|---|---|---|---|
| Courier and postal bags | x | x | x | x | x |
| Cash bags and containers | x | x | |||
| Vehicle door latches | x | x | |||
| Tote bags | x | x | |||
| Roll cage pallets | x | x | x | ||
| Tankers – petroleum, bulk foods and liquids | x | x | |||
| Forensic evidence bags | x | ||||
| Plastic distribution boxes | x | ||||
| Airline food and duty-free trolleys | x | ||||
| Security documents and containers | x | ||||
| Gaming security | x | ||||
| Large bags for retail, pharma and food industries | x |
Security seals
Class “S” security seals are made of material that provides limited resistance to intrusion and requires lightweight tools for removal.
A highly secure alternative to standard locks, due to an enhanced locking mechanism. The seal is easy to use on pull-tight applications. The long tag is ideal for printing tamper-evident-seal QR codes, serial numbers, or sequential numbering and barcodes of up to 13-digits, which facilitates tracking and authenticity verification. The seal also has very high tensile strength and can be removed with the appropriate cable cutters. Polypropylene (PP) body with chrome plated steel hasp. These are available in green, blue and red.
Use for: Vehicle doors, bulk tankers, duty-free carts and roll cages.
An ideal choice for more demanding application. These seals offer a low-cost and secure single-use alternative to conventional padlocks. Options include a smart tamper evident seal that features an RFID tag for electronic scanning and logging. There are a variety of color alternatives as red, blue and silver.
The seal can only be removed with wire cutters (sold separately). They are made from tamper evident transparent material. SAN resin and polypropylene (PP) body with chrome plate steel hasp.
Use for: plastic distribution boxes, vehicle doors and warehouse bonded store doors
High security seals
“H” class seals are constructed and manufactured of material such as metal or metal cable with the intent to delay intrusion. These high security seals are specifically designed to prevent counterfeiting and unauthorized access by incorporating tamper-evident features and unique numbering systems. They can generally be removed with substantial bolt cutters or cable cutters.
Customs Trade Partnership Against Terrorism (CTPAT) is part of the U.S. Customs and Border Protection’s (CBP) cargo enforcement strategy. This program is used by the CBP with the trade community to strengthen international supply chains and improve U.S. border security. CTPAT is solely a voluntary partnership program that recognizes that CBP can provide the highest level of cargo security only through close cooperation with stakeholders in the international supply chain. This includes importers, carriers, consolidators, licensed customs brokers, and manufacturers. CTPAT requires ISO 17712 “H” class seals.
Used worldwide to secure goods during import and export. These seals can secure goods for long periods of time. The non-preformed cable unravels when cut to prevent tampering. The steel cable can only be removed using a tool. Non-preformed galvanized steel aircraft cable with aluminum body. Compliant with ISO17712:2023 and CTPAT with cable diameters of 3.5mm and above. Available in blue, red, bronze and black.
Use for: Shipping containers, cargo containers, rail freights, plastic distribution boxes, petrochemical valves, trucks and trailers.
The insert and pin head keep the seal engaged on the application’s latch when the plastic cover is intentionally or accidentally removed. It has limited 180-degree rotation when engaged. These tamper evident seals prevent high-speed spinning attacks on the barrel. The bolt seal also features a label attachment.
Range includes different options, including coated and uncoated pins. The coated pin has an additional layer of paint that gives it an extra layer of protection from chips and damage. The bolt seal barrel is made from high-quality ABS material, giving it good impact resistance while also indicating evidence of tampering.
ISO 17712:2013 (coated pin option only) and CTPAT compliant.
Use for: Shipping containers, cargo containers, trucks, trailer vehicle doors and rail freights
Do seals really help?
Tamper-proof seals do not exist – remember, these are not locks. Tamper evident seals deter tampering, which makes them incredibly valuable for communicating the integrity and/or safety of your package. A tamper-evident seal on a container means that it is being monitored. This in turn gives customers confidence in what they’re buying, as they know they can buy products with intact tamper evident seals and trust that the contents have not been tampered with. Without that sense of security that a seal inspection provides, customers would look elsewhere for their needs.
Sustainable Tamper Evident Security Seal
If you’re factoring sustainability into your choice, consider our all-metal cable seals. Metals should never be considered waste at the end of a product’s life. They’re a valuable resource – metals can be 100% recycled without degradation. Consider, too, our greener alternative in plastic. Essentra Components are also producing a range of security seals made from 45% recycled plastic.
Download free CADs and try before you buy
Free CADs are available for most solutions, which you can download. Free samples are also typically available to make sure you’ve chosen exactly what you need.
If you’re not quite sure which premium tamper evident seal will work best for your application, our experts are always happy to advise you.
Whatever your requirements, you can depend on fast dispatch. Request your free samples or download free CADs now.
Questions?
Email us at sales@essentracomponents.com speak to one of our experts for further information on the ideal solution for your application 800-847-0486.