Tamper-Evident: Seals & Labels

This macro groups tamper-evident solutions for the anti-intrusion context, aimed at deterring unauthorized opening and providing evidence of tampering. Two core families: Security seals — plastic, metal and cable (incl. padlock-style) models for parcels, cabinets, containers and logistics. Options include serial numbering, customisation and closures designed to leave visible evidence when forced. Anti-tamper labels — VOID (reveals message on lift), ultra-destructible, tamper tapes and scratch-off to mask codes or sensitive areas. Suitable for packaging, devices and chain-of-custody use cases. The range is complemented by security bags and, where needed, meter security items. The goal is consistent marking and instant readability across the supply chain: choose size and substrate according to surface, environment and required visibility. (Note: these are passive anti-tamper/anti-intrusion measures and do not replace physical or electronic intrusion systems.)

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FAQ & Quick Guide: Security seals (plastic, metal, cable, bolt, meter)

In this category you’ll find all security seals for logistics, transport, warehousing, fire extinguishers and utility meters (water, gas, electricity). Tamper-evident labels are covered in their dedicated subcategory: here we focus on physical seals (indicative, semi-barrier, barrier) to block unauthorised openings and reveal any tampering.

How do I choose the right seal?

  • Adjustable plastic (pull-tight) seals: single-use, numbered, sliding closure. Ideal for bags, crates, lockers, fire extinguishers. They tighten and immediately show cuts or re-openings.
  • Padlock seals: handy for zippers, bags, trolleys, cash boxes. Indicative, fast to apply and inspect.
  • Metal strip seals: robust indicative seals for warehouse doors, trucks, light containers. Clear visible numbering.
  • Cable seals: higher security level. For containers, trucks, gates; require bolt cutters for removal. Available in various diameters and lengths.
  • Bolt seals: barrier grade for containers and export. Bolt + cap with matching numbering; removal only with heavy-duty cutters.
  • Meter seals: dedicated to water/gas/electricity. Plastic with pin/clip or lead seals + wire. Prevent tampering and fraud with visible evidence.
  • Lead seals & sealing wire: classic solution for valves, meters, panels. Use with sealing pliers; can be numbered and customised.
  • No pass-through points? Use tamper-evident adhesive labels (VOID, holographic, destructible) in the labels subcategory.

Sizes, diameters and tensile strength

  • Passage diameter: measure the hole/eyelet to pass through; choose cable or strap accordingly.
  • Usable length: calculate the circumference of the sealing point + extra to pull and lock.
  • Security class: indicative (visual control), semi-barrier (more resistant), barrier (container/export). For containers use proper bolt/cable seals.

How to apply correctly?

  1. Clean and dry the sealing area.
  2. Insert the strap/cable through the hole and lock into the head; pull to tension.
  3. Check the closure and record the serial number on the delivery note/register (traceability).
  4. Bolt/cable: fully insert and leave no slack; removal requires tools.
  5. Meters: route the wire as intended and close with a lead seal or dedicated meter seal; ensure it doesn’t rotate/slide.

Customisation and traceability

Sequential numbering, barcode/QR, logo and colour increase deterrence, control and recognition. Recommended for logistics, retail chains, service providers and audited sites.

Typical applications

  • Logistics & shipping: closing parcels, trailers, bays, containers.
  • Retail & GDO: cages, carts, backroom, returns and RMAs.
  • Utilities & plants: meter seals, electrical panels, valves.
  • Safety & firefighting: extinguishers, PPE cabinets, emergency kits.
  • Administration & services: cash bags, pouches, tamper-proof envelopes.

Mistakes to avoid (real talk)

  • Light seal on a container: use bolt/cable, not indicative plastic.
  • Wrong diameter: too thick won’t pass, too thin is easily forced.
  • Loose seal: creates leverage and micro-gaps: always tension it properly.
  • No serial log: without traceability, your seal is half-effective.
  • Wrong environment: choose materials/temperature ratings for outdoor, cold, chemicals.

Quick questions

  • Reusable? No, they are single-use: any reopening must be evident.
  • How to remove? Plastic: snips/heavy scissors. Cable/bolt: only with bolt cutters.
  • For export? Choose barrier seals (bolt/cable) suitable for containers and intermodal transport.

Operational tip: containers → bolt/cable; bags/extinguishers → pull-tight plastic; meters → lead seals + wire or dedicated meter seals; pouches/zips → padlock. For surfaces without pass-through points, use tamper-evident labels in the subcategory.

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