Best Underguard in 2026

20' x 25' of 6 ounce density geotextile underlayment

Will come as two pieces equivalent to the square footage

Ideal uses include: pond underlayment, stabilization, weed barrier, landscaping, and construction underlayment

45 Mil EPDM Fish Safe Liner with a 20 Year Limited Manufacturers Warranty.

This Top Grade Tear and Puncture Resistant 45 mil EPDM liner is perfect for adding a stream or for lining your waterfall.

Never settle for PVC or anything less than 45 mil EPDM PondGard Liner.

45-Mil EPDM Rubber Pond liner with UnderGuard Underlayment has a Limited Lifetime Warranty

Durable, puncture resistant, extremely versatile for use in waterfall features, pond kits, water gardens, retention basins, koi ponds, aquaponics, lakes, stream liners, and fish hatcheries.

Does not contain plasticizers, which become brittle and cause cracks or splits.

45-Mil EPDM Rubber Pond liner with UnderGuard Underlayment has a Limited Lifetime Warranty

Durable, puncture resistant, extremely versatile for use in waterfall features, pond kits, water gardens, retention basins, koi ponds, aquaponics, lakes, stream liners, and fish hatcheries.

Does not contain plasticizers, which become brittle and cause cracks or splits.

45-Mil EPDM Rubber Pond liner with 25-Year Warranty

Durable, puncture resistant, extremely versatile for use in waterfall features, pond kits, water gardens, retention basins, koi ponds, aquaponics, lakes, stream liners, and fish hatcheries.

Does not contain plasticizers, which become brittle and cause cracks or splits.

45-Mil EPDM Rubber Pond liner with 25-Year Warranty

Durable, puncture resistant, extremely versatile for use in waterfall features, pond kits, water gardens, retention basins, koi ponds, aquaponics, lakes, stream liners, and fish hatcheries.

Does not contain plasticizers, which become brittle and cause cracks or splits.

45-Mil EPDM Rubber Pond liner with UnderGuard Underlayment has a Limited Lifetime Warranty

Durable, puncture resistant, extremely versatile for use in waterfall features, pond kits, water gardens, retention basins, koi ponds, aquaponics, lakes, stream liners, and fish hatcheries.

Does not contain plasticizers, which become brittle and cause cracks or splits.

45-Mil EPDM Rubber Pond liner with UnderGuard Underlayment has a Limited Lifetime Warranty

Durable, puncture resistant, extremely versatile for use in waterfall features, pond kits, water gardens, retention basins, koi ponds, aquaponics, lakes, stream liners, and fish hatcheries.

Does not contain plasticizers, which become brittle and cause cracks or splits.

45-Mil EPDM Rubber Pond liner with UnderGuard Underlayment has a Limited Lifetime Warranty

Durable, puncture resistant, extremely versatile for use in waterfall features, pond kits, water gardens, retention basins, koi ponds, aquaponics, lakes, stream liners, and fish hatcheries.

Does not contain plasticizers, which become brittle and cause cracks or splits.

45-Mil EPDM Rubber Pond liner with 25-Year Warranty

Durable, puncture resistant, extremely versatile for use in waterfall features, pond kits, water gardens, retention basins, koi ponds, aquaponics, lakes, stream liners, and fish hatcheries.

Does not contain plasticizers, which become brittle and cause cracks or splits.

45-Mil EPDM Rubber Pond liner with 25-Year Warranty

Durable, puncture resistant, extremely versatile for use in waterfall features, pond kits, water gardens, retention basins, koi ponds, aquaponics, lakes, stream liners, and fish hatcheries.

Does not contain plasticizers, which become brittle and cause cracks or splits.

20 Year Limited Manufacturers Warranty

45 Mil (1.14 mm) (0.045") EPDM

75 Year Life Expectancy

45-Mil EPDM Rubber Pond liner with 25-Year Warranty

Durable, puncture resistant, extremely versatile for use in waterfall features, pond kits, water gardens, retention basins, koi ponds, aquaponics, lakes, stream liners, and fish hatcheries.

Does not contain plasticizers, which become brittle and cause cracks or splits.

20 Year Limited Manufacturers Warranty

45 Mil (1.14 mm) (0.045") EPDM

75 Year Lift Expectancy

20 Year Limited Manufacturers Warranty

45 Mil (1.14 mm) (0.045") EPDM

75 Year Life Expectancy

Water proof formula suitable for use in a wide range of climatic environments from hot to freeze/thaw conditions

Specifically designed for underwater use and to be non toxic and fish and plant safe

Self priming formula allows for reliable adhesion for a finished surface that is easy to maintain

45 mil thickness provides superior durability while maintaining the ability to stretch

Exceptional resistance to solar UV, ozone, and oxidation

Great for use in ponds, Pondless Waterfalls, and other water features; safe for fish and plants

45 mil thickness provides superior durability while maintaining the ability to stretch

Exceptional resistance to solar UV, ozone, and oxidation

Great for use in ponds, Pondless Waterfalls, and other water features; safe for fish and plants

45-Mil EPDM Rubber Pond liner with 25-Year Warranty

Durable, puncture resistant, extremely versatile for use in waterfall features, pond kits, water gardens, retention basins, koi ponds, aquaponics, lakes, stream liners, and fish hatcheries.

Does not contain plasticizers, which become brittle and cause cracks or splits.

60-Mil EPDM Rubber Pond liner with 25-Year Warranty

Professional grade strength and durability for heavy duty applications when placing heavy boulders, expected wildlife use, and high-profile builds. For use in waterfall features, pond kits, water gardens, retention basins, koi ponds, aquaponics, lakes, stream liners, and fish hatcheries

Does not contain plasticizers, which become brittle and cause cracks or splits.

45 mil thickness provides superior durability while maintaining the ability to stretch

Exceptional resistance to solar UV, ozone, and oxidation

Great for use in ponds, Pondless Waterfalls, and other water features; safe for fish and plants

Country Of Origin: Macedonia, The Former Yugoslav Republic Of

The Package Height Of The Products Is 10.899999988882" Inches

The Package Length Of The Products Is 14.299999985414" Inches

Water proof formula suitable for use in a wide range of climatic environments from hot to freeze/thaw conditions

Specifically designed for underwater use and to be non toxic and fish and plant safe

Self priming formula allows for reliable adhesion for a finished surface that is easy to maintain

This item is a flat sheet pond liner measuring 4 Feet Wide x 6 Feet Long (1.22 m x 1.83 m) in 20-mil Black (0.50mm) PVC

Example pond size for this liner: 3' Wide x 5' Long x 0.5' Deep with 0' Overlap

20-mil Black (0.50mm) PVC liner material is very flexible and easily conforms to shapes and contours and is both Fish and Plant Friendly!

FLEXIBLE AND EASY TO INSTALL POND LINER: PVC material is light, malleable, puncture resistant, and long-lasting.

PROTECT YOUR POND: This liner will help to contain your pond, while also creating a safe and healthy environment for wildlife and plants. Help take care of your water features, pond pumps, filters, and more with the liner in place.

IDEAL SIZE: This 10'x12' Precut piece is easy to place for any small or medium pond. This liner is .5mm/20 mil thick. Holds up to 400 gallons.

This item is a flat sheet pond liner measuring 8.5 Feet Wide x 15 Feet Long (2.59 m x 4.57 m) in 20-mil Black (0.50mm) PVC

Example pond size for this liner: 4.5' Wide x 11' Long x 1.5' Deep with 0.5' Overlap

20-mil Black (0.50mm) PVC liner material is very flexible and easily conforms to shapes and contours and is both Fish and Plant Friendly!

Ideal membrane for retaining water in Koi and fish ponds, Pondless Waterfalls, and other water features

Aquascape liner leads the industry in quality and reliability, making it the ideal choice for discriminating pond owners and professionals

Backed by an industry-leading 20-year guarantee, the 45 mil thickness provides superior durability while maintaining the ability to stretch for ease of installation

Vinyl liner patch kit for patching small vinyl liner pinholes and tears

Everything you need for effective underwater patching

Kit contains 4 23 x 6 inch clear patches

20' x 25' of 6 ounce density geotextile underlayment

Will come as two pieces equivalent to the square footage

Ideal uses include: pond underlayment, stabilization, weed barrier, landscaping, and construction underlayment

Water proof formula suitable for use in a wide range of climatic environments from hot to freeze/thaw conditions

Specifically designed for underwater use and to be non toxic and fish and plant safe

Self priming formula allows for reliable adhesion for a finished surface that is easy to maintain