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Cirtex® SiltSocks are robust, permeable socks used to divert and filter runoff on hard surfaces.

SiltSocks allow for the filling material to be selected to suit the required application. Cirtex supply both filled and unfilled options.

Cirtex SiltSocks are made from high strength UV stabilised fabric and are a quick and effective way of managing sediment runoff on a project site to prevent sediment from entering our waterways.


SiltSock & Cesspit Filter Bag

Try our interactive Cesspit Filter Bag installation featuring the use of a SiltSock.

Use your mouse to navigate the scene, click, drag and zoom around at your own pace. Click on the numbers to further inspect the process.

Please note: This is only a conceptual overview of the installation process, site-specific requirements may vary.

Frequently Asked Questions

Benefits & Features

  • Robust polypropylene woven SiltSock
  • Reusable
  • Ideal for protecting culverts, drain outflows and stormwater runoff gullies
  • Made from a high strength UV stabilised polypropylene, SiltSocks can be filled with a range of mediums including coarse sand, gravel or wood chips
  • Quick and easy to install
  • Includes handles for carrying and staking


Roll size
SiltSock Unfilled 1m
1m x 150mm
SiltSock Unfilled 2m
2m x 150mm
SiltSock Unfilled 3m
3m x 150mm
SiltSock Bark Filled
2m x 150mm
SiltSock Reinforced Saw Dust Filled
3m x 225mm




  • North Island Erosion & Sediment Control Guidelines
  • South Island Erosion & Sediment Control Guidelines

*These documents are current as of 13th June 2017. After this date it is your responsibility to check that these documents are the most current specifications relating to erosion and sediment control for your desired region.