Slackibloc 4.0 (banana) In stock


The weblock for slackline webbing. Light and user-friendly, made in France, for all your longlines!


The SLACKIBLOC is a light but quite strong weblock, ideal for longlining.
The tempered aluminum body allows high resistance up to 10 kn and a light weight with its 165 gr. only.

Technical specifications

  • 2,5cm webbing locker = for thin webbing
  • Weight : 165g
  • The Slackiblok has an anodized aluminum diverter which distributes the energy on the webbing's surface;
  • The inox 17-4PH makes a working load limit at 15 kN possible and provides a safety factor of 5:1
  • Composition : Tempered aluminium - very resistant to shocks and corrosion
  • With the ball-lockpin system the webbing is easily blocked and secure in the weblock.
  • Breaking Load : 50kN
  • Working Load : 10kN

Using advices 

  • The Slackibloc is compatible with basically all standard types of connectors.
  • We recommend 2,2T BOW SHACKLES WITH CAPTIVE PIN, one of the most efficient shackle.
  • To use on slacklines longer than 50m. Below this length, a line lock is still suitable (attention to the tension force), but the weblock will be easier to pre-tension the webbing
  • On high-tech webbing such as our "Moonwalk", it will necessary to use the double wrap method (see video below)
  • Each webbing has his own resistance into a weblock. To know the just resistance of your webbing with the Slackibloc, go to the webbing page and have a look at the "technical specifications" section


  • The Slackiblok is not a PPE equipment
  • Please read carefully the user guide before use
  • Wide webbing (>2,5cm)
  • Small shackles (less than and 10mm shackles)
  • Delta quick link (less than and 10mm shackles)
  • Freestyle : Jumpline/Trickline, for this buy the Andy Lewis kit

Weblock set up

How to determine the tension in your slackline ?

  • Our spreadsheet :
    Thanks to the following sheet, you will be able to approximately know the tension into your gear (slings, shackle, slackline, etc.). You will then know if you are using it correctly, meaning correctly regarding the using advices and most important the strength limits.

    Click there to see the sheet and enter your datas

  • The dynamometer or Linescale
    This product allows you to mesure exactly what is the tension into your equipment.
    For more informations click there.


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