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Top 9
June 2025
Best 20 X 25 40 Mil Epdm Pond Liner
We made a list of the top 9 20 X 25 40 Mil Epdm Pond Liner based on verified reviews, popularity and other factors which we summarized for you in this list.
Best Choice
1
25 x 35 Firestone 45 Mil EPDM Pond Liner
Firestone
10.0
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2
10 x 25 Firestone 45 Mil EPDM Pond Liner
PondGard
9.6
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✓
20 Year Limited Manufacturers Warranty
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45 Mil (1.14 mm) (0.045") EPDM
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75 Year Lift Expectancy
✓
Environmentally friendly
✓
SAFE for fish and plant life
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10% Discount
3
LifeGuard Pond Liner 20 ft. x 25 ft. 45 Mil EPDM Rubber and Underlayment Combo - CLGUG20X25
LifeGuard Pond Liner
9.4
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✓
45-Mil EPDM Rubber Pond liner with UnderGuard Underlayment has a Limited Lifetime Warranty
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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.
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Does not contain plasticizers, which become brittle and cause cracks or splits.
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Easy to install, lays flat, very pliable for easy shaping and feature fitments. Geotextile will come in multiple pieces equivalent to total square footage.
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Certified Fish & Wildlife Safe by Guardian Systems Inc. This Item Ships via Freight Truck: Lift-gate service is not included. Carriers require accurate contact information, (including a working phone number), to schedule a delivery appointments.
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4
Firestone PondGard 45 Mil 20 x 25-Feet EPDM Pond Liner
Firestone
9.3
VIEW DEAL
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✓
20 Year Limited Manufacturers Warranty
✓
45 Mil (1.14 mm) (0.045") EPDM
✓
75 Year Life Expectancy
✓
Environmentally friendly
✓
SAFE for fish and plant life
Learn more
on Amazon
More Info
10% Discount
5
Lifeguard 20 ft. x 40 ft. EPDM Pond Liner – 60-Mil Rubber Liner for Outdoor Ponds, Waterfalls, Aquaponics, Retention Basins – Durable & Fish Safe
LifeGuard Pond Liner
9.2
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✓
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.
✓
Easy to install, lays flat, very pliable for easy shaping and feature fitments
✓
Certified Fish & Wildlife Safe by Guardian Systems Inc. This Item Ships via Freight Truck: Lift-gate service is not included. Carriers require accurate contact information, (including a working phone number), to schedule a delivery appointments.
Learn more
on Amazon
More Info
10% Discount
6
Lifeguard 20 ft. x 20 ft. EPDM Pond Liner – 45-Mil Rubber Liner for Outdoor Ponds, Waterfalls, Aquaponics, Retention Basins – Durable & Fish Safe
LifeGuard Pond Liner
9.1
VIEW DEAL
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✓
45-mil EPDM Rubber Liner - Durable, flexible, UV and puncture resistant, fish and wildlife safe for koi ponds, water gardens, and aquaponics systems.
✓
Versatile Use for Outdoor Water Features – Ideal pond liner for outdoor ponds, waterfalls, streambeds, fish hatcheries, and retention basins.
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No Plasticizers – Won’t Crack or Split – Unlike vinyl liners, EPDM stays flexible year-round without becoming brittle over time.
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Easy to Install & Shape – Lays flat and conforms easily to curves, shelves, and other pond features—perfect for DIY installations.
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Certified Fish & Wildlife Safe – Backed by – Safe for koi, turtles, and aquatic life. Certified by Guardian Systems Inc. and supported by a 25-year manufacturer’s warranty for long-term peace of mind.
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7
Aquascape PRO Grade EPDM Boxed 45 Mil Liner for Pond, Waterfall, and Water Features, 20 x 25 Feet | 85004
Aquascape
9.0
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✓
45 mil thickness provides superior durability while maintaining the ability to stretch
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Exceptional resistance to solar UV, ozone, and oxidation
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Great for use in ponds, Pondless Waterfalls, and other water features; safe for fish and plants
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Easy installation; no tools required; 20-year guarantee
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Measures 20 x 25 Feet
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10% Discount
8
VEVOR 20 x 25 ft Pond Liner, 45 Mil Thickness, Pliable & Durable EPDM Material, Easy Cutting Underlayment for Fish or Koi,Waterfall, Fountains, Water Gardens, Black
VEVOR
8.6
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✓
Keep Your Fish Secure: You can prevent water and soil from seeping out of the pond and contaminating water resources by using our pond liner. This will create a better living environment for your fish. Moreover, you can add aquatic plants, rocks, and wildlife to make your pond more attractive.
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45 Mil Thick: The pond liner is 20' x 25' in size and is designed to be puncture and tear-proof. So you don't have to worry about sharp rocks or root growth damaging the liner. Plus, the liner provides a flat surface and reduces soil buildup, which makes cleaning your pond easier and quicker.
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Prevents Aging: This fish pond liner is made of high-quality EPDM material. This means that even when exposed to direct sunlight, the liner will not crack, split or deteriorate, allowing it to retain its properties for years to come.
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Pliable & Flexible: Our pond lining is flexible and easy to bend and fold, making it suitable for almost any pond shape. Before purchasing, it is important to determine your pond's precise depth and width. We recommend buying a liner that's slightly larger than your pond. Any excess liner can be easily cut off after installation.
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Natural Pond Look: No tools are required for installation. It's ideal for a variety of water features, including water gardens, waterfalls, outdoor ponds, fish/koi ponds, and more. The liner can even be extended for use in planting beds and other self-watering projects.
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9
UWIOFF Pond Liner 20 x 25ft 20 mil Pond Liners for Outdoor Ponds, UV Resistant Pond HDPE Liner for Fish Ponds, Pool, Water Features, Fountains, Waterfall and Water Gardens, Black
UWIOFF
8.5
VIEW DEAL
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✓
20 mil Thick HDPE - Pond liner 20 mil, thick pond liners for outdoor ponds; Ultra-durable yet lightweight, 20 x 25ft large size is easy cutting and to install
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Safe Material - Made of good quality HDPE, our pond liners for outdoor ponds are UV and puncture resistant, waterproof and leak proof, can be used in outdoor ponds for many years; Safe for your fish and plant
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Easy to Clean - This fish pond liner provides a flat surface for your pond, reducing the soil accumulation. Also can effectively prevent harmful substances in the soil from penetrating into the pond to pollute the water, so that you can clean the pond easily
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Multifunctional Use - Great liner for any backyard waterfalls, outdoors ponds, fish/koi ponds, and other water features; Can be used in different ways: Utilize the liner for raised garden beds, sub-irrigation planters, and other self-watering projects
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100% Quality Service - Each product of UWIOFF has been strictly screened and is seriously responsible for every customer. We offer 7 days, 24 hours worry-free customer support service
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