Swell HDPE Liner 40-Year Guarantee With Heavy Duty Underlay

HDPE Liner Overview

The Swell HDPE Pond Liner with a 40-year warranty and heavy-duty underlay offers lasting protection for ponds of all sizes and shapes. Made from tough high-density polyethylene, it resists sun damage and provides long-term performance whilst remaining flexible enough to fit various pond designs.

Key features:

• Made from high-density polyethylene for strength and durability
• Resistant to sunlight to protect against UV damage over time
• Thickness: 0.35mm – durable yet easy to handle
• Available in multiple pre-cut sizes to fit different ponds
• Supplied with a heavy-duty underlay to reduce the risk of tears or punctures

This liner carries a 40-year warranty covering damage caused by sunlight. While punctures aren't included in the guarantee, the heavy-duty underlay helps protect the liner from sharp stones, roots, and uneven ground beneath. We also offer a range of pond liners with different warranty options.

To pick the right liner size, measure your pond’s length, width, and depth, then use our online calculator to find the perfect fit.

Why choose this liner?

• Exceptional long-term value with an extended 40-year UV guarantee
• Built to withstand exposure to sunlight for many years
• Durable yet manageable, making installation straightforward
• Comes with a heavy-duty underlay for added protection
• Perfect for a variety of pond types including koi, wildlife, and ornamental water features