Unisto Twinfix

Fixed-length security seal for applications such as truck doors, railway wagons and containers. Strap seal (7.0 x 2.2 mm) with metal spring for increased security requirements. Also available with removal aid for easy removal of the seal without any additional tools. With customer logo. Numbered and barcoded for fast data acquisition and optimised procedures. Available in various coloured plastic.

Features of this security seal

Seal type
Fixed-length seal 
Doors of trucks, railway wagons and containers 
  • Metal spring increases tamper protection
  • Double wavy line on the strap for simple checking for any manipulation
  • Customer name/logo for clear identification
  • Laser marking in plastic for extreme loads
  • The barcode permits rapid and secure data acquisition

Minimum size


Strap/housing: Polypropylene (PP)

Cover plate: Polypropylene (PP) 

Spring: Stainless steel   

Length 345 mm from spring centre, with stop lobe (237 mm from spring centre) in the strap 
Tensile load (loop)
approx. 35 kg  
with/without removal aid, without strap return 
interleaved 2/5 or barcode 128 

directly lasered in barcode

a) C128 (6, 7, 8, 9, 10 or 12 digits)

b) Interleaved 2/5 with check number (5, 7, 9, or 11 digits)

c) Interleaved 2/5 without check number (6, 8, 10, or 12 digits)


Customer name/logo
Foil embossed or directly lasered  
Colours – barcode directly lasered

White, yellow, apricot, pink, violet, grey, light brown 

Other colours on request  

Mats of 10, boxes of 1000 

Seals should be stored in original box away from direct sunlight and chemical fumes.

Store at 22°C/50% RH. Typical shelf life of seals made of PP and PA are approx. 18 months from date of manufacture.

Nevertheless please do not order more than an annual quantity. 

Unisto Twinfix - Security Seal
Fixed-length security seal for applications such as truck doors, railway wagons and containers.  


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