Heavy Duty Pond Liner HDPE material with a thickness of 0.12 mm (5 mil). Designed to withstand extreme weather and provide longterm operation in outdoor ponds. Safe for fish and plants; environmentally friendly. Flexible and cuttofit design. Can bend and fold to match almost any pond shape and can be cut to the exact dimensions you need. Easy to install. The bottom layer creates a flat surface to minimize soil buildup and allows tool installation. A layer of round cobblestones can be placed on of the liner as part of the setup. Protective and watercleaning functionality. Acts as a barrier that prevents soil contaminants from penetrating the pond, helping to keep water clean and supporting a healthy environment for wildlife and plants. Also makes routine cleaning easier. Specifications and compatibility. Material: HDPE. Thickness: 0.12 mm / 5 mil. Suitable for longterm outdoor use and compatible with a variety of pond sizes and shapes. Use scenarios Backyard garden pond or fish habitat: lines irregular or curved shapes, provides durable protection against soil intrusion, and supports a clean water environment. Landscape water features or decorative ponds: flexible to fit custom designs; easy to adapt to different layouts and edging schemes. Greenhouse or outdoor portable ponds: lightweight, durable liner that remains reliable in varying climates and protects aquatic life.