Cirtex® SiltSocks are a robust permeable sock, 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.


  • 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




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

3m x 225mm

SiltSock Diagram

Silt Sock Diagram


*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.

South Island Erosion & Sediment Control Guidelines
State Highway Erosion & Sediment Control Guidelines

Related Products


SiltFence is a woven geotextile consisting of strong, rot resistant, chemically stable long chain synthetic polymer materials, dimensionally stable with each other.


Polypropylene and Hessian sandbags are commonly used for water diversion and weighing down objects around construction sites. Available pre-filled or flat packed.

Cesspit Filter Dam

Cesspit Filter Dam is a simple solution to filter out silt and debris. It is used as a temporary control when repairing water mains and small roadside repairs. Filter Dams are quick and simple to install.

Cesspit Filter Bag

Cesspit filtration filter bags are temporary filtration inserts used during construction and maintenance of subdivision roading designed to filter out silt and debris.

Related Case Studies

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TCDC Slip Repair Tuateawa Coast Road – Platipus® ARGS

11 Feb 2016

A significant landslip had occurred on the downhill side of the road from Colville to Kennedy Bay closing it to one lane. The integrity of the road was compromised, and the slope dropped steeply down to the sea. The challenge was to prevent further surface erosion, stabilise the surface, and blend in with the surrounding environment.

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Hamilton Ring Road – BioCoir

10 Feb 2016

Cirtex® supplied a significant quantity of BioCoir matting for the Hamilton Ring Road project. Cirtex BioCoir is a biodegradable coconut fiber matting for erosion and sediment control and landscaping applications. BioCoir was ideal for this application, protecting the cut faces and exposed soil from wind and water erosion.

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Greville Road Project – EnviroSieve Turbidity Curtains

5 Feb 2016

Contractor HEB Construction used four 25m x 1.5m EnviroSieve Turbidity Curtains fastened together to contain sediment from a 100m long section of road works with outstanding results.

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