Secutex® Green Secutex® Green is a biodegradable nonwoven geotextile. Due to the controlled production process of the fibres and the nonwoven geotextile, we ensure a constant quality. The robustness can be adapted to your individual requirements. The German geotextile robustness class (GRK) characterises the resistance against mechanical stresses during installation and construction. Select the GRK that suits your project. Secutex® Green is available in the robustness classes GRK 2 (low) to GRK 5 (high) and has widths of 2m, 4m and 6m.