GEOLINE HD500 – 0.5 mm Smooth HDPE Pond & Dam Liner

GEOLINE HD500 is a smooth high-density polyethylene liner, 0.5 mm (500 micron) thick, manufactured by Huitex from premium virgin HDPE resin with carbon black for UV protection, plus antioxidants and stabilisers. It is designed for water containment on low-risk sites: farm dams, irrigation reservoirs, aquaculture and fish ponds, stock watering dams, rainwater storage, decorative and garden ponds, and temporary water storage.

Where HD500 fits. At 0.5 mm, this liner suits clean water, a well-prepared subgrade free of stones and roots, gentle side slopes, and sites where the liner is covered or protected rather than left exposed to traffic and machinery. Used within those limits, it is a cost-effective way to stop seepage and make a dam hold water.

Where HD500 does not fit. This is the part we would rather lose a sale over than get wrong. Do not use 0.5 mm liner for landfill or waste containment, tailings storage facilities, heap leach pads, process solutions, effluent or leachate ponds, hydrocarbon or chemical containment, any application with regulatory liner requirements, sites with sharp or rocky subgrade, steep slopes, heavy wave action, or exposed installations under machinery or livestock traffic. These need 1.0 mm, 1.5 mm or thicker liner, usually textured on slopes, and often with a protection geotextile. Ask us and we will quote the correct grade.

Standards, stated honestly. GRI-GM13, the benchmark HDPE geomembrane specification, covers thicknesses from 0.75 mm to 3.0 mm. HD500 is thinner than that range, so it is not a GM13-compliant product and we do not claim it as one. It is manufactured to Huitex's own quality standards, with mill certificates supplied for every roll. Where your specification, consultant or regulator calls for GM13 compliance, choose GEOLINE HD750 (0.75 mm) or heavier from our GRI-GM13 range.

Thickness is an engineering decision. GM13 itself does not determine the correct thickness for a site, the liner system configuration, chemical compatibility or the protection geotextile required. As a rough guide: 0.5 mm for low-risk clean water containment on prepared subgrade; 0.75 to 1.0 mm for light-duty and larger reservoirs; 1.5 mm as the workhorse for mining, landfill and industrial containment; and 2.0 mm and above for high-load or hazardous sites. If your project is near the boundary, go thicker. A liner failure costs far more than the difference in material price.

Supply and installation. HD500 comes in two roll formats so you can match the roll to the job and cut offcut waste: 5.8 m × 100 m covering 580 m² for smaller dams, ponds and sites without lifting equipment, and 7 m × 420 m covering 2,940 m² for large reservoirs, where the wider panel means fewer welded seams across the basin. The large roll weighs roughly 1.4 tonnes, so a crane, excavator or telehandler with a spreader bar is needed to offload and deploy it. The liner is welded on site by hot wedge or extrusion. Our IAGI-aligned crews install and test across Africa, or we can supply liner, welding rod and accessories for your own installer, with delivery to over 30 countries.