HDPE pond liners are the most cost effective versatile and adaptable liners available. It is ideal for ponds of all sizes with steep or gentle sloping sides, tight corners, contours and shelving. It is pliable and flexible which supports to a variety of irregular surfaces. It can attaches easily to waterfall boxes, weirs and skimmers. It contains plasticizers which will get deteriorate in direct sunlight. It even remains flexible and pliable even in extreme hot or cold temperatures To get best result use ground cover, rocks or gravel to protect PVC liner from direct UV exposure..