Cirtex® SiltFence is a high quality UV stabilised woven polypropylene silt control fabric used to prevent silt runoff entering our waterways.

SiltFence is a requirement to be used around construction and earthworks sites to prevent the silt running off the construction zone in an uncontrolled manner, polluting our waterways. SiltFence meets the requirements of Local Authorities for a primary barrier against site runoff.

Cirtex SiltFence is manufactured from a robust UV stabilised yarn, providing a strong and stable product that will last in the harsh conditions we find here in New Zealand. This ensures that there is no premature failure on projects sites resulting in costly contamination of surrounding properties and waterways.

The effectiveness of SiltFence can be limited if not installed correctly. We have put measures in place to ensure your SiltFence is a succcess. See below.

View our installation diagram here.

The plastic yarn or fibres used in this geotextile consist of at least 95% by mass of polyolefins, polyesters or polyamides, and contain stabilisers and inhibitors added to the base plastic to make the filaments resistant to deterioration due to ultraviolet and heat exposure.

Super SiltFence is a double layer product with a sewn joint and is also available from Cirtex. Super SiltFence requires Super SiltFence Wire Mesh to be placed behind the fence to give additional strength and support.


  • High strength woven Slit-Film SiltFence
  • Filters out solids while allowing water flow
  • UV stabilised
  • Meets the requirements of Local Authorities for a primary barrier against site runoff
  • Available in high-vis orange for application where SiltFence has a secondary function as a visual barrier
  • Available in convenient 50m long rolls.

SiltFence Installation Dimensions

Based on 1.5m Steel Y Posts.

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.





1.0m x 50m



1.3m x 50m


SiltFence Orange

1.3m x 50m

How to build a SiltFence


*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.


What is SiltFence?

Where is SiltFence used?

What roll sizes are available?

How is SiltFence installed?

Related Products


A quick and effective way of managing sediment runoff into culverts and waterways.

Super SiltFence

Super SiltFence is the combination of a double layer silt fence material supported with a galvanised wire mesh.

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Cirtex Steel Y Posts are a strong durable post used for many applications on an civil construction site.

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