SuperWedge is a strong, lightweight plastic wedge that locks your SuperSleeper boards into SuperPost channels during wall assembly. It secures the fit, speeds up installation and keeps your wall straight.

SuperWedge is a small but key part of building your composite retaining wall. Made from tough plastic, it’s shaped to slide between the SuperSleeper and SuperPost, locking them into place securely.

For every SuperSleeper you order, Order 2 SuperWedges

All you have to do is push it into the gap – its tapered design means no hammering or tools are needed. It keeps everything stable, stopping sleepers from moving while you finish the wall and helps maintain straight, level lines.

Designed to resist cracking, UV and weather, SuperWedge holds up under tough outdoor conditions while being handy for beginners, yet also fast and reliable for professionals.

SuperWedge Plastic Key Features

• Weight: 0.016 kg
• Supports and stabilises composite sleepers in retaining walls
• Designed to fit snugly between the sleeper and post
• Lightweight and easy to position
• Ideal for DIY and trade installations
• Weather- and UV-resistant plastic
• Helps maintain clean lines and alignment
• Reduces long-term movement and structural stress

Installing SuperSleepers yourself? Check out our step by step blog - How to install SuperSleepers