The Replas 100 mm bollard has just completed a 12 month trial in the harsh ground of New Zealand’s Wai-O-Tapu Thermal Wonderland. This unique landscape takes its toll on timber sign posts, fences and boardwalks as the sulphuric acid rapidly carbonises wood, turning it black in much the same way fire does. The trial aimed to see how recycled plastic would stand up to the tough conditions.

When it was pulled from the ground this week, apart from a sulphur residue, the bollard hadn’t changed shape, melted, or degraded in any way. On removal the bollard was too warm to keep hold of and the steam coming out of the vent hole where it was sitting was 95° C, yet the bollard looked as good as the day it went in.