Heissner Extra Strong Pond Underlay 3 x 4 m / 12 m², 200 g/m² / Stärke 1,0 mm

This heavy-duty pond underlay by HEISSNER in neutral white serves as a reliable and protective shield for your pond liner against mechanical damage from sharp stones, invasive roots, or shifting ground. Its high puncture resistance and tear-resistant texture means the material can absorb the significant downward pressure exerted by the water, ensuring long-lasting protection from leaks. The rot-resistant, virgin-grade fabric remains stable over the lifespan of the pond. For the best results, it should be installed over a layer of sand to create a high-performance protective sandwich structure.