ABG Pozidrain / Barrierdrain is a thin, preformed sub-surface water drainage or gas vent geocomposite consisting of a HDPE cuspated core laminated to a geotextile on one or both sides, and a flat selvedge on one side. Fluid entry is only possible from one side. Typical applications are structural drainage, cut-off trenches, capillary breaks, gas vents etc where a degree of impermeability is required.