Durable HDPE pond liner for outdoor ponds: sunproof, UVresistant, waterproof and punctureproof for longterm outdoor use. The liner is flexible and tearresistant, helping prevent other materials from seeping into the pond and creating a safe environment for fish and plants. Easy to clean and maintain: provides a flat surface that reduces soil buildup and helps stop substances in the soil from seeping into the pond, protecting water quality and simplifying pond cleaning. Flexible sizing and fit: available in multiple sizes with good flexibility; easy to trim to the exact dimensions you need and to fold or bend to fit your pond shape. Tool installation: can be installed easily without tools and adapts to a variety of designs. The easy cutting function allows you to adjust landscaping, size, and layout as needed. Avoid placing the mat on sharp objects. It is strong but not indestructible. Use scenario 1: install in a backyard pond to create a durable, longlasting habitat for koi or other fish, ensuring UV protection and waterproofing while preventing seepage. Use scenario 2: create a garden pond with water lilies or aquatic plants; the flat, tearresistant surface helps maintain water quality by reducing soil seepage and making maintenance easier. Use scenario 3: design an irregular or decorative water feature or pondless display that requires custom shaping; trim and fold the liner to fit the contour of the feature without specialized tools.