The double-locking, tamper-resistant cable seal
High-security, STM-integrated, and ideal for any security application. Two independent locking mechanisms protect the seal from ratcheting, picking, and freezing.
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The double-locking seal for any security application
The Duplexeal is a high-security, tamper-resistant cable seal integrated with the Red Flag STM (Security Transit Management) system.
Double-locking
Two independent locking mechanisms protect the seal from ratcheting, picking, and freezing.
Tamper-resistant
Independently tested for evidence of tampering by Dayton T. Brown: ratcheting, picking, sleeving, cable changing, and freezing.
High-security “H” seal
ISO 17712:2013 and C-TPAT compliant high-security “H” seal for international transit.
STM-integrated
Works with the Red Flag STM suite — scan, filter, apply, and receive notifications on iOS and Android.
Your color, your numbering, your logo
Color-code lanes, shifts, or products. Custom length, logo, and application-specific packaging — every seal ships in individually bar-coded plastic bags to assist with data entry.
Red
Green
Blue
Black
One seal for railcars, containers, and OTR trucks
Every Duplexeal ships individually bar-coded, ready to scan into STM.
Length
- Railcars
- 350 mm / 14″ cable
- Containers / OTR trucks
- 1500 mm / 60″ cable
Cable
- Diameter
- 2.2 mm and 3.2 mm non-preformed cable
- Options
- Custom length, logo, and application-specific packaging
Security
- Standard
- ISO 17712:2013 / C-TPAT compliant high-security “H” seal
- Tested
- Dayton T. Brown: ratcheting, picking, sleeving, cable changing, freezing
Integration
- Platform
- Red Flag STM & iOS/Android applications
- Packaging
- Individually bar-coded plastic bags to assist with data entry
Sealing real shipments, in real conditions
Installation photos from customer shipments.
Autorack door hardware
Color-coded, customer-branded seals — every serial is bar-coded and tracked in STM.
Hopper gate, double-locked
Two independent locking mechanisms protect against ratcheting, picking, and freezing.
Tank trailer valves
The thin 2.2 mm cable threads through valve handles and tight hardware.
Sealed door latch
Every Duplexeal ships individually bar-coded, ready to scan into STM.
Apply it right, every time
Learn the proper way to apply and seal the Duplexeal — and how it works with STM for end-to-end cargo security and 360-degree insight into your supply chain.
- Two independent locking mechanisms in one seal
- End-to-end traceability and visibility in STM
- Remote monitoring of seal health and security, in real time
Certificado y probado de forma independiente
Red Flag cumple con los estándares de calidad establecidos y alineados con ISO, C-TPAT y Dayton Brown.
Todas las certificacionesSecure your transit
Secure your cargo, understand cargo health, anticipate predictive anomalies, and empower security and supply chain personnel — get Duplexeal pricing for your lanes and volumes.
The rest of the Red Flag lineup
Need live tracking and theft alarms too? LXE is the connected seal — and STM ties every seal and shipment together.
LXE
Disposable GPS cable seal with live tracking and a 60-second theft alarm. No equipment, no subscriptions.
Learn more
LXR
ISO 17712 high-security cable seal for containers, railcars and trailers.
Learn more
Hopper Bolt
Heavy-duty bolt seal engineered for hopper railcars and bulk transport.
Learn more
STM
Security Transit Management — one dashboard for every shipment, seal and alert.
Learn more
SecureDrive
Digital trace of ownership handovers from origin to destination — mechanical seals plus driver-GPS tracking in the STM app.
Learn more
Digital Container Inspection
Guided digital inspections — truck & trailer, intermodal container, and railway equipment — that standardize checks and capture proof.
Learn more