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The 1BZ Drain Geocomposite features a high-density polyethylene (HDPE) net drainage core for optimal flow under high load. It has a non-woven polypropylene geotextile filter/separator on one side & an extruded (PE/EVA) geomembrane on the other. Terram T1000LE is used for a geotextile filter with high tensile modulus to prevent soil from clogging the drainage core. It comes in a 2 x 25m roll size. Suitable for highways, retaining walls, bridge abutments, engineered landfills, tunnels, & buried structures. In highways, it interrupts groundwater flow & minimizes excavation. For retaining walls & bridge abutments, it reduces pore water pressure & prevents backfill saturation. In engineered landfills, it offers long-term chemical resistance & high compressive strength. In tunnels, it acts as a barrier against groundwater seepage, ensuring structural integrity. For buried structures, it provides drainage for basements, culverts, car parks, & reservoirs.. Terram 1BZ Geocomposite Drain - 2000mm x 25m