Prolock Sigma plastic sheeting
Maintenance-free sheeting made from recycled plastic — durable for more than 50 years, without painting, staining or replacing.
Prolock Sigma
What is Prolock Sigma?
Prolock Sigma is an advanced plastic revetment system for bank protection and earth retaining. The bulkheads are made of recycled HDPE — robust, rot-free and resistant to water, soil acids and micro-organisms.
It click-lock connection system each bulkhead clicks watertight into the previous one, without additional fasteners. Suitable for professionals and do-it-yourselfers. Directly from stock Houthandel Jan Sok.
Advantages
Why choose Prolock Sigma?
A future-proof choice for almost any bank protection situation — from garden pond to professional waterway.
50+ year lifespan
No rot, corrosion or material degradation - even in permanently wet conditions.
100% maintenance-free
Never paint, stain or treat. Install once, worry-free for years.
UV resistant
Retains color and strength under prolonged exposure to sunlight.
Click-lock mounting
Quick installation without specialist tools or additional fixings.
Recycled HDPE
100% recycled plastic — circular and environmentally conscious without compromising on quality.
All soil types
Resistant to soil acids and changing water levels in almost any surface.
Compare with hardwood: hardwood vs. plastic.
Specifications
Technical data
Prolock Sigma is the heaviest variant in the Prolock range — suitable for deeper waterways and heavier loads.
| Material | Recycled HDPE (High-Density Polyethylene) |
|---|---|
| Wall thickness | Approx. 30 mm effective profile |
| Bulkhead width | Approximately 200 mm working |
| Lengths | 60, 80, 100, 120, 150 and 200 cm |
| Colour | Anthracite / dark gray (standard) |
| Connection | Patented click-lock profile |
| Weight | Approx. 6–12 kg per shot (depending on length) |
Applications
Where is Prolock Sigma used?
Versatile in use throughout the Netherlands, Belgium and Germany — from private gardens to professional waterworks.
Garden ponds & ornamental ponds
Sleek, dark appearance for modern gardens. Safe for fish and plants.
Ditches & waterways
Chosen by water boards and municipalities because of low long-term maintenance costs.
Agricultural canals
Impact-resistant material that can withstand livestock and heavy ground pressure along plots.
Private banks
Ease of maintenance and longevity — increasingly popular with homeowners.
Parks & green projects
Minimal maintenance costs for municipalities over decades.
Cost per metre
Indicative prices and cost structure for your revetment project.
View prices →
Installation
Easy to install yourself
Thanks to the click-lock system, you can install Prolock Sigma without specialist tools. The six basic steps:
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Digging a trench
Dig along the bank line to the desired depth.
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Install support posts
A hardwood post or steel profile every 100–150 cm.
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Place first shot
Press the first baffle into the ground and attach to the post.
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Scots click
Click each subsequent shot via the click-lock profile.
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Full length
Repeat until the entire bank is covered.
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Finish
Fill with soil; finish with a deck board or ground cover.
Durability & warranty
Environmentally conscious and guaranteed
Prolock Sigma is made from 100% recycled plastic. Plastic afval krijgt een tweede leven als hoogwaardig bouwmateriaal — en is na 50+ jaar opnieuw recyclebaar.
- No chemical treatments required
- More energy efficient than tropical hardwood
- Extensive manufacturer's warranty on all products
More about maintenance? Lifespan and maintenance. Garantiedetails: get in touch.
Read more
Everything for your sheet piling project
Webshop
Order Prolock Sigma and accessories directly online.
To products →Prolock Light
Lighter version for garden ponds and small-scale projects.
View Prolock Light →Hardwood vs plastic
Compare materials and choose what suits your situation.
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Order directly in the webshop or request a no-obligation quote for larger projects. Personal advice from our specialists.