- Mipatex HDPE Geomembrane Pond Liner is a perfect choice for water gardens, fish ponds and bachyard waterfalls. It is ideal for ponds of all sizes with steep or gentle sloping sides, tight corners, contours and sheliving Can be used for many different projects including Landscaping, Retaining walls, French drains, Underlayment, Erosion Control, Gardening, Riprap filter fabric, Pond underlayment, Construction Projects and more