HOME > Pull tight seals - Smooth flat strap > SmoothLock


The SmoothLock has a flat, smooth strap and embedded metal jaw. This results in a user-friendly, yet secure pull-tight seal. It can be used to secure big bags, such as courier and mail bags. Its large tag allows for more information to be printed - even barcodes may be laser printed on.

B-Sealed now offers sustainable range of products, including security seals made from at least 50% recycled materials, and biodegradable additives.


  • Courier and postal bags
  • Tote boxes and security containers
  • Cash-in-transit bags and courier bags
  • Ballot boxes
  • Forensic evidence bags
  • Truck doors & side curtains
  • Tote bags & roll cages

Key Features

  • Smooth strap is more user-friendly than conventional designs.
  • The stainless steel locking mechanism gives a high level of security once applied.
  • Moulded in high quality food grade polypropylene as standard, but on special orders are able to be moulded in polyamide (nylon) for extra durability.
  • Ability to have side or twist tear off options integrated into the tag gives option for tool-less removal.
  • Optional barcoding.
  • Made from at least 50% recycled plastic.
  • Optional Biodegradable additives.


  • Various colours
  • Logo and other markings
  • Laser engraved / Hot stamped
  • Serial numbers
  • Barcodes & QR codes (laser)
  • Polyamide (nylon) version
  • Biodegradable additives

Minimum order quantity required.



Various colours, lengths, and options available
  product code strap length strap width strap thickness tag size shop link
SmoothLock 300 SM30 300mm 5.0mm 2.0mm 30mm x 67mm available, ask us
SmoothLock 400 SM40 400mm 5.0mm 2.0mm 30mm x 67mm available, ask us
SmoothLock 350 Big Tag SM35NC 350mm 5.0mm 2.0mm 65mm x 130mm  
SmoothLock 400 Big Tag SM40NB 400mm 5.0mm 2.0mm 65mm x 130mm  
SmoothLock 450 Big Tag SM45NB 450mm 5.0mm 2.0mm 65mm x 130mm  



Made from recyclable plastic. Please ensure used seals are disposed correctly into proper bins.

Recyclable plastic pp Recyclable steel
Need help with choosing which type of seal? Chat with us or check out our comparison table: Compare now

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This product is available for purchase, hassle-free, at online-only prices through SecuritySeals.com.au.

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contact us

Need more information? Require brochures or samples? Having trouble deciding on which seal is best for you? Or do you have questions about the seals and how they're used? Don't hesitate to contact us. Our team is accessible by phone during standard business hours, or you may prefer to get us via e-mail. Either way we'll get in touch with you promptly. We take pride in our top quality service.