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Pond Liner & Underlay

We carry a full line of flexible 45 mil EPDM pond liner and installation products to create the perfect pond or water feature. From large commercial ponds to small water gardens you'll find the perfect installation and repair products here.

SIZING A POND LINER

First, you will need three pond dimensions- length, width and max depth. These measurements should be all be made in feet. You’ll then add the length to two times the depth plus 2. You use two times the depth because the liner needs to go down on both sides. The extra two feet is for overhang. This gives you one extra foot on each side.

    The formula will look like this:
  • Pond Length + (2 x Max Depth) +2 = Length of Liner
  • Pond Width + (2 x Max Depth) + 2 = Width of Liner
    For example:
  • Longest Length = 10’
  • Widest Width = 6’
  • Deepest Depth = 3’
  • 10’ + (2 x 3’) + 2 = 18’
  • 6’ + (2 x 3’) + 2 = 14’

So, the liner needed for this pond is 18’ X 14’. More often you’ll need to round up or down since liners are cut in 5 ft. increments. The closest liner size, commonly available for the above dimensions, would be a 20’ x 15’ liner.

Pond Liner & Underlay
Firestone EPDM Liner

Firestone PondGard EPDM liner is the material of choice for various waterproof lining applications. Specially formulated to be fish and plant safe, they can easily be shaped to fit the unique contours of any size pond or complex landscape feature.

PVC Liner

PVC Pond Liner is fish safe and specifically designed for the rigors of pond and waterfall construction. We offer 30 and 40 mil thickness options.

Pond Underlayment

Protect your liner from rocks, roots and other sharp objects with a fabric underlayment. Can also be used on top of liner to protect from punctures when adding gravel and stone inside the pond.

Seaming & Repair Materials

Whether seaming or repairing liner you'll find all the necessary components here. Choose from seaming and repair tapes, patch kits, pipe-boots, etc.

Pond Armor Epoxy Waterproof Pond Sealant

Pond Shield Epoxy Coating was created to coat and seal water features like ponds, fountains, and waterfalls. Designed to be painted on to a solid, constructed surface and give a more formal and finished look than typical rubber or plastic liners. Just 3 simple steps: Prepare the pond, apply the coating, enjoy the pond!

Laguna Heavy Duty Preformed Ponds

Laguna Water Basins provide the all-important foundation for your water garden. Water basins are generally easier to install than lined, in-ground ponds since their shape and depth are pre-determined.

Atlantic Flexible Hardscape Basins

For those applications that require an open basin, Atlantic's Flexible Basins are the easiest way to waterproof your block installation. Available in tan, grey and black to compliment any surround up to eight-feet wide.

Basins

These reservoirs make it easy to install a formal spillway, basalt column or disappearing fountain of your choice. Designed to take the guesswork out of installing fountain rocks, hand-carved stone, brass fountains, and bubbling urns.

All Pond Liners (EPDM) & Underlays

We carry the full line of flexible Firestone 45 mil Pond Liner and installation products to create the perfect koi pond or water feature. If you are looking for a rugged liner at a great price our site is the place to be. From large commercial ponds to small water gardens we have the right product for you. Protect your pond with a long lasting, fish safe and fish friendly Firestone Liner.

Our Most Popular Pond Liner & Underlay

Insist on the Best, Insist on Firestone 45 mil EPDM Pond Liner!

This Pond Liner is formulated for water garden application and is consistently produced to the strict specifications of Firestone Incorporated.

  • 45 mil, ultraviolet stabilized flexible EPDM rubber pond liner
  • Heavy duty pond liner
  • Fish and Plant Friendly & Easy to Install
  • Lifetime Warranty Click here for more information
  • The most widely used material in water gardening.
Firestone PondGard Pond Liner

Firestone PondGard Pond Liner

  SKU Liner Size Pond Size 24" Deep Gallons of Water Weight Ships Via
01010
10' x 10'
4 x 4
240
29 lbs
Ground
01015
10' x 15'
4 x 9
540
44 lbs
Ground
01020
10' x 20'
4 x 14
840
58 lbs
Ground
01030
10' x 30'
4 x 24
1440
90 lbs
Ground
01515
15 x 15
9 x 9
1215
66 lbs
Ground
01520
15' x 20'
9 x 14
1890
87 lbs
Ground
01525
15' x 25'
9 x 19
2565
109 lbs
Ground
02020
20' x 20'
14 x 14
2940
116 lbs
Ground

The Best Protection For Your Pond Liner

Don't Forget Liner Underlay. Underlay is a flexible, soft fabric placed under the pond liner for protection against punctures and friction from rocks.

  • 3.5oz - 4 oz

*The roll of underlay listed below as will ship via UPS Freight.

Pond Underlay

Pond Underlay

  SKU Underlay Size Square Feet
17710
10' x 15'
150
17715
15' x 15'
225
17720
20' x 15'
300
17725
25' x 15'
375
17730
30' x 15'
450
17740
40' x 15'
600
17775
50' x 15'
750
17360
15' x 360' Roll*
5400
U17360
15' x 360' Roll*
5400

Quick, easy to use kit for repairing minor damage to your rubber (EPDM) pond liner.

Firestone Repair Kit

Firestone Repair Kit

  SKU
00144

Insist on the Best, Insist on Firestone 45 mil EPDM Pond Liner!

Firestone PondGard EPDM geomembrane is engineered to provide dependable performance in a variety of critical containment applications.

Based on EPDM (ethylene propylene diene terpolymer) synthetic rubber, PondGard is a highly flexible, stable waterproofing membrane. Specially formulated to be safe for fish and plant life, PondGard can easily be shaped to fit the unique contours of any size pond or complex landscape feature.

  • 45 mil, ultraviolet stabilized flexible EPDM rubber pond liner
  • Fish and Plant Friendly & Easy to Install
  • Lifetime Warranty Click here for more information
  • The most widely used material in water gardening.
Large Pond Liners Shipping via Common Carrier

Pond liner listed as 'common carrier' will ship via UPS Freight, one of the fastest and most reliable common carriers in the industry. The shipping charge will be based upon the weight of the liner and your delivery zip code ensuring the best possible delivered price.

For a shipping quote click the 'add to cart' button next to the liner size of your choice and then enter your state and delivery zip code to receive an immediate, real-time shipping quote.

During checkout, you will choose either residential or commercial as the delivery location. Residential deliveries will receive a call from the carrier before delivery. Commercial deliveries will take place without a call before delivery leading to a quicker delivery, these deliveries must be shipped to a commercial property. If you operate your business from your home, this is not considered a commercial delivery. Please note that you as the buyer are responsible for unloading the delivery from the truck. The carrier does not have equipment to remove the liner from the truck. A 'lift gate' is available for an additional fee, please call customer service at 866-819-7663 before ordering for a quote on this option.

Firestone Pond Liner - 50 ft Rolls

Firestone Pond Liner - 50 ft Rolls

  SKU Liner Size Weight Ships Via
21050
10' x 50'
155 lbs
Common Carrier
21550
15' x 50'
220 lbs
Common Carrier
22050
20' x 50'
295 lbs
Common Carrier
22550
25' x 50'
365 lbs
Common Carrier
23050
30' x 50'
440 lbs
Common Carrier
23550
35' x 50'
510 lbs
Common Carrier
24050
40' x 50'
575 lbs
Common Carrier
25050
50' x 50'
725 lbs
Common Carrier

Limited availability, please call

Carlisle's 45 mil Fish-Friendly EPDM AquaTough Rubber Pond Liners combine design flexibility, long-term durability and easy installation, making them an ideal choice for a variety of waterscape applications.

All of these liners will be shipped via Fedex Ground. 
AquaTough Boxed Pond Liner

AquaTough Boxed Pond Liner

  SKU Liner Size Pond Size 24" Deep Gallons of Water Weight
324199
10' x 15'
4 x 9
540
44 lbs
324210
15' x 15'
9 x 9
1215
66 lbs
324211
15' x 20'
9 x 14
1890
87 lbs
324212
20' x 20'
14 x 14
2940
116 lbs
324294
20' x 25'
14 x 19
3990
145 lbs

A clean, easy, safe way to create larger panels to cover a greater surface area. Environmentally friendly, and creates strong seams.

    Kit Contents
  • 1 Roll - Quickseam Splice Tape - 3" x 25'
  • 1 pt Can - Single-Ply LVOC Primer
  • 1 QuickScrubber Handle
  • 1 QuickScrubber Pad
  • 1 Seam Roller
  • 1 Special Crayon
  • Instructions
Firestone Quickseam Tape Seaming Kit

Firestone Quickseam Tape Seaming Kit

  SKU
00145

Ultra Bond SeamPrime is a primer/surface conditioner and adhesive enhancer for self-adhering cover seam tapes, and self-adhering membranes and underlayments. DO NOT USE ON PVC

  • Maximize Adhesion
  • Enhance Cold Weather Application
  • For All Self-Adhesive Construction Tapes & Membranes

Quick Roof UltraClean is a unique non-chlorinated blend of solvents that removes oxidation, grease, oil tree sap, and other contaminants from roof surfaces and other building materials. Non-chlorinated liner cleaner that removes oxidation, grease, oil, tree sap, and other contaminants from EPDM, PVC, and other surfaces.

  • Dries Fast
  • Leaves no residue
  • Non-chlorinated
Tite Seal Seam Primer & Cleaner

Tite Seal Seam Primer & Cleaner

  SKU
01400

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