SmartLine 21' Round Sunlight Overlap Expandable Pool Liner — 60" Height, 20 Gauge

Designed for 21' round pools, this SmartLine Sunlight Overlap Expandable Swimming Pool Liner is a 20 Gauge, 60" height model built in the USA by pool industry professionals with over 50 years of experience. Constructed from 100% virgin vinyl, the material includes built-in UV protection and is formulated to resist punctures, cracking and fading. The liner tolerates harsh pool chemicals and prolonged sun exposure, operating across a wide temperature range from -50°F to 130°F. Each liner is hand folded for a smoother, wrinkle-free installation. A gasket set is included to help prevent leaks and is compatible with all thru-wall skimmers and water return lines.