Posted by AC&M

Pull-Up or “adjustable” cable seals are mainly chosen for greater strength when a plastic or wire seal is too easily cut open, or cannot withstand the application environment, like extreme temperatures or physical impact.

Adjustable cable seals can deter or prevent quick and easy opening by persons who would maliciously tamper with a seal without any level of concern. Cutting cable seals requires stronger and less common tools than are used to open wire and plastic seals.


In order to choose which cable seal is right for you, visit the “Cable Seals” section on our website. Our security seal experts can help guide you to the appropriate size, length, and type of cable seal for your application.

Longer seals with thinner cables are easier to bend or turn and can be used to fit places where other seals cannot go. Heavy duty cables will provide a stronger barrier to cutting and tampering, but require enough space to bend and lock them as they are both strong and stiff.

Some popular applications for cable seals include tanks and tank truck valves, hoppers, truck and container doors, gates, control panel, and meter boxes. Cable seals are commonly used for tagging machinery, vehicles and high-value assets or storage containers. They’re a secure alternative to locks in secure closures that are not frequently opened when the user does not want to monitor access to keys.

Choose the right material. Aluminum body seals are popular for their resistance to corrosion, and the capability to add markings by lasers, such as logotypes and barcodes. Meanwhile, steel seals are popular for their stronger body and more durable marking that is physically stamped into the seal. Stamped markings are limited to very simple logotypes, or usually letters and numbers.

Available lengths range from 6 inches to 72 inches and cable diameters are from 1.5mm to 4mm.

If you are protecting international shipments, choose a seal that meets current ISO standards. We offer several cable seals that comply with recognized ISO-17712 and C-TPAT standards for high security (H) seals. Also, as the producer, AC&M is compliant with the ISO standards and procedures required and recognized worldwide for high-security seals and is a registered seal manufacturer under ISO-9001:2008.


As with all seals, proper control, record keeping, and inspection is important. See our recommended best practices at our web site for details.

To insert a cable seal, the cable must be inserted parallel to itself into the hole on the same side where it is already attached and extends from the lock body. A firm push is required to start it.

When locking a pull-up cable seal it is very important that the seal is pulled as tightly as possible without damaging whatever device it is attached to. A loose seal can be vulnerable to manipulation. Pull to test the seal after installation and make sure it is fully tightened in place

Most seals have a cable that will fray or spread when cut, so re-use is not possible after cutting. For cable seals that do not fray after cutting it is recommended that you cut off the excess cable after sealing. This also prevents re-use.

When removing cable seals use a good quality bypass type shear. For light to medium cables, we offer a cable cutter, Model C7. If a large number of heavy duty seals are being cut then larger cutters can ease the job. Longer bypass cutters can be found at electrical supply or industrial tool supply vendors.

After use, dispose of the seals completely by crushing the body with a hammer or destroying the markings with a sharp tool.

Our web site provides thorough information including data sheets, photos etc. If you have further questions about cable seals or need a quotation please contact us or your AC&M representative.