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Contact SupplierComposite Dimple Geomembrane Drainage Board DescriptionComposite Drainage Board is a kind of geomembrane with dimples on the surface, The dimples can be in cylinder and semicone shape, Drainage Board could also be coated by non woven geotextile, The liquid and gas can go through freely between dimples. Specification1. Sheet Material: PE or EVA, etc. 2. Thickness: 0.8mm - 2.0mm 3. Dimple Height: 8mm, 15mm, 20mm 4. Width: 2m - 3m 5. Length: As request 6. Composite Layer: Non Woven Needle Punched Geotextile 7. Loading: 20ft container, 40ft high container 8. Free Samples, Fast Delivery Time Property1. Waterproofing and drainage: from a channel, which water and gas can go through2. Sound insulation and vibration isolation3. Chemical resistance, resist to plant's root4. Easy for construction  5. Long lifetime   Appreciation1. Highway and railway waterproofing system2. Underground waterproofing .