Pond Liner Installation

Pond Liner

Think of pond liner like a foundation of a home.  A water feature is only as good as the liner (foundation) that it’s built upon.  Choosing a cheap liner that isn’t designed to withstand what you’re building can lead to leaks and hours of labor fixing problems.  Starting with a good foundation will give you peace of mind.

Flexible pond liner is one of the most popular types of liners today.  Mainly because of its physical malleability that allows more design options.  You can use flexible pond liners for a range of projects from shallow and small splash ponds for kids to a raised koi pond for fish hobbyists, a large pond, waterfall, or rainwater harvesting.

Firestone Pond Liner

Firestone Pond Liner

Firestone PondGard liner is one of the most popular pond liners installed today.  Many professional water feature contractors use it along with serious do-it-yourself homeowners.  Offered a range of sizes from 5′ x 5′ all the way to 50′ x 200′ rolls in 45 & 60 mil thicknesses.  When you really need a large pond liner you can also use the Firestone Quickseam system and attach more liners to make one gigantic liner.  Pond Gard liner remains flexible -from 45° to + 175°F to allow for year round installation.   And also has built-in protection against frost, ozone, UV exposure, snow, and extreme temperatures.  Specially designed to be safe for fish and aquatic plants.

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PondGard liners have been used for a wide range of projects including:

  • Koi ponds
  • Garden ponds
  • Reflection ponds
  • Golf course ponds
  • Fountains
  • Streams
  • Waterfalls
  • Rainwater harvesting
  • Lakes
  • Canals
  • Dams
  • Fish & shrimp farms
  • Floating covers
  • Landfill covers
  • Wetlands
  • Erosion control management

Firestone has really made a name in the water feature industry as a leading pond liner supplier.  Using advanced rubber pond liner manufacturing technology.

As a company they’re committed to green manufacturing processes and sustainable products.

ISO 9001 – BSI Registered product.

PondGard lining really shines when you need a large pond liner.  As large pond liners can be very expensive and hard to install.  With Firestone’s complete system you can easily seam multiple liners together with nothing special needed.

To ensure no splitting or cracking Firestone engineered their EPDM liners without any migrating plasticizers.  In fact, many water features using Firestone PondGard 45 Mil pond liners are still in service today with virtually no issues.

Firestone pond liner is also designed to resist algae and microbial attacks to give you a healthy and safe water feature.

Standard Widths: 10′, 15′, 20′, 25′, 30′, 40′, 50′.

Standard Thickness is 0.045″ or 45 mil.

Standard Weight for 45 Mil Liner: .31 lbs per sq. ft.

Pond liner installation tip:  Don’t drag the liner into the hole.  Place it in the hole and carefully unfold it.  Avoiding any sharp objects.

Once installed Pond Gard liner requires little to no maintenance.  And if something does happen it’s easy to repair Firestone pond liner on site.

Firestone PDF

Firestone Limited Warranty PDF

Boxed Pre-Cut 45 Mil EPDM Pond LinerView Product Page

Pre-Cut Boxed Garden Pond Liner

Pre-cut 45 Mil Firestone PondGard Liner.  Available in the following sizes: 8′ x 10′, 10′ x 10′, 10′ x 15′, 15′ x 15′, 15′ x 20′, 20′ x 20′.  Just simply open the box, position into the correct place, and then unfold.  Comes with a 20 year warranty and made in the USA.



45 & 60 Mil EPDM Pond Liner Per Sq. Ft.View Product Page

45 Mil EPDM Pond Liner

Buy 45 mil & 60 Mil pond liner in the exact specifications that you need.  Pay per sq. ft. of pond lining.  Just multiply the length times the width to get the square footage.  Then enter that in the quantity box. In the comments section of the order let us know your dimensions.  If you need a heavy duty pond liner the 60 mil EPDM should work perfectly.



Aquascape Pond Liner

45 mil Rubber Aquascape Pond LinersView Product Page

Aquascape Pond Liner

Aquascape pond liner is 45 mil EPDM fish safe flexible rubber.  Made in the USA and comes with a 20 year warranty.  Small Aquascape pond liners come in pre-cut boxed packages and if you need a large pond liner it will come on a roll.



EasyPro Pond Liner

Integra Pond Liner

30 Mil EPDM EasyPro Integra Pond Liner


Economical EPDM rubber pond liner.  This liner fills the gap between cheaper pond liners like HDPE and PVC with more expensive 45 and 60 mil EPDM liners.  Comes with a 25 year warranty and is wildlife, plant, and fish safe.  Super flexible and easy to install.  UV and ozone resistant.


Integra Pond Liner FAQs

Yes it is wildlife, plant, and fish safe.

Yes Integra pond liner can be patched or seamed just like any other EPDM pond lining.  You can even attach it to other liners made of different thicknesses or manufacturers.

You can Integra pond lining on pretty much any water feature that calls for EPDM pond liner.  From pondless waterfalls, koi ponds, fountains, rainwater harvesting, water gardens, and more.

You can use this on pretty much any water feature that calls for EPDM pond liner.  From pondless waterfalls, koi ponds, fountains, rainwater harvesting, water gardens, and more.  Although you should use additional protection with pond underlayment, or more layers of liner.

Compared to other EPDM pond liners for sale, Integra liner doesn’t have a smooth surface.  So talc power isn’t needed to stop it from sticking to itself.  This also makes it a little darker in color and more true black pond liner.

Integra pond lining is made in Spain.  Not China like other pond liners for sale online.

Integra EPDM liner weighs .17 lbs per square foot.  Almost half of what most 45 Mil EPDM pond lining weighs (.31 lbs).

Integra FAQs PDF

30 Mil EPDM Integra Pond Liner - Per Sq. Ft.View Product Page

30 Mil Integra Pond Liner

Buy 30 mil Integra EPDM pond liners in the exact specifications that you need.  Pay per sq. ft.  Just multiply the length times the width to get the square footage.  Then enter that in the quantity box. In the comments section of the order let us know your dimensions.



Pre-Cut 30 Mil EPDM Boxed Integra Pond LinerView Product Page



Buy Integra pond liner in pre-cut boxed sizes: 10 x 10, 10 x 15, 15 x 15, 15 x 20, 20 x 20, 20 x 25, 25 x 25.



Roll EPDM Boxed Integra Pond LinerView Product Page

Roll of Integra Pond Liner for Garden Ponds


Full rolls of EasyPro Integra liner. Available in 10′, 15′, 20′, 25′, 30′ widths.  All rolls are 100′ long and ship motor freight.



PVC Pond Liner

TotalPond 14.5 Mil PVC Pond LinerView Product Page

20 Mil PVC Pond Liner

TotalPond “Pond Skins” PVC pond liner that is 30% lighter than other traditional PVC pond liners, but just as flexible and strong.  Engineered with a polyester weave for additional strength, and puncture and UV resistant to allow for many years of use.  Uses a textured surface to promote beneficial bacteria growth.  Comes with a 20 year limited warranty.

A good inexpensive choice for small ponds.  As these pre-cut small pond liners come in three sizes; 7×10, 10×13, and 13×20.


Polyethylene Pond Liner

24, 30 & 40 Mil EasyWeave Reinforced Polyethylene Pond LinerView Product Page

EasyWeave 24 Mil Greenline Pond Liner

If you’re looking for an ideal pond lining for large ponds reinforced woven polyethylene pond liner is your answer.  Custom made sizes, all the way up to 65,000 sq. ft. in ONE piece!  These polyethylene pond liners were designed to be light weight while still maintaining strength.  UV stabilized with multi-layers woven together for additional durability.  Comes with a 20 year warranty when used underwater and a 10 year warranty in applications exposed to direct sunlight.


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What sizes are available?

These liners come in 24 mil triple ply, 24 mil five ply, 30 mil triple ply, and 40 mil five ply thicknesses.  Quantity and pond liner price is based on sq. ft. ordered.

How long does it take to get a custom liner size?

Please allow 11-15 days for manufacturing and delivery of a custom liner.

Do this polyethylene pond lining require soil on top?

No unlike other PVC pond liners that require you to use 12″ of dirt on top of the whole liner, EasyWeave liners don’t need coverage other than around the edges.

Can EasyWeave be seamed?

Yes EasyWeave liner seaming tape in 4″ and 2″ double sided seam tape is available.   Along with weld-on and tape-on pipe boots up to 48″ (please contact me for these).

Burst Strength Comparison:

  • 24 Mil EasyWeave Polyethylene Pond Liner – AW24S – 740 Lbs.
  • 40 Mil EasyWeave Polyethylene Pond Liner – AW40 – 1220 Lbs.
  • 30 Mil PVC Pond Liner – 226 Lbs.
  • 60 Mil HDPE Pond Liner – 541 Lbs.

All tests were completed by TRI Environmental in Austin, Texas.

Pond Seal

PondSeal is made up of sodium bentonite clay that is bonded to limestone aggregate to create pellets. The pellets expand to form a gel like substance when in contact with water.  Allowing you to seal leaks without having to drain your pond.  They’re eco-friendly with natural ingredients that will not affect water chemistry.  Safe for wildlife, pets, and people.  Can be used in a wide variety of applications: seal intake pipes, cuts and tears in pond lining, muskrat holes, seal earthen dikes and dams, fish ponds, etc.  Comes in a 50 lb. bag or a 2400 lb. supersak (ships motor freight).


Pond Liner AccessoriesView Product Page

Pond Liner Repair Kit

All the accessories you need to install and repair pond liner.  Firestone Quickprime, single sided pond liner tape, double sided pond liner tape, liner cleaning pads, water block sealant, seam rollers, pipe boots, lap sealant, pond liner patch kits, and aluminum termination bars.



Pond Liner UnderlaymentView Product Page

pond liner underlayment

Pond underlayment to provide protection for your liner against stones, roots, or other sharp objects.  Designed out of non-woven geo-textile fabric and available in three widths; 5′, 10′, and 15′.  Keep in mind though that underlayment doesn’t need to be all in one piece.  You can overlap multiple sections if needed.  Underlayment can be used on the top of your liner as well as underneath for additional protection.



Liner Underliner VentingView Product Page

Pond Liner Underliner VentingPatented multi-vent underliner system that provides pond and lagoon liners protection against water accumulation and methane gas.  Just simply lay the venting system on the soil before installing the liner.  It’s wrapped in pond underlay to prevent plugging and can help you avoid costly pond liner repairs down the road.

Liner air vent valve also available.



Pond Shield / Pond ArmorPond Armor or PondShield is a two part epoxy sealer (nontoxic) that was engineered to seal steel, concrete, wood, fiberglass, and more.  Bonding to the substring instead of covering it.  Provided a pond lining without any wrinkles and less worry about having to repair a liner.  Just roll or brush on for an easy installation.  Available in multiple colors; black (most popular as black pond liners are the mainstay in the market), clear, competition blue, grey, tan, and copper.  Sized in easy to use 1.5 quart cans. Each Pond Shield kit will cover just about 60 sq. ft. of surface area.




Here are some frequently asked pond liner questions:

While no liner will be indestructible (clay, polyurea, and concrete are pretty durable).  You can make your EPDM pond liner dog proof by covering the top with a layer or two of underlayment.  You could also place some additional scrap liner on top as well for added protection in the areas that the dog/s would step on.  If the bottom of the pond is deep enough where the dogs nails cannot get to it you should be OK in those areas.

Unless the project is temporary with a small budget we always recommend EPDM as a pond liner membrane.

If you have a leaking pond liner we suggest getting one of our pond liner repair kits and following the instructions.  If it is a large hole you may need to seam some new liner in place, or replace the liner all together.

When comparing fish pond liners for sale it’s important that you use “fish safe pond liner”.  Some companies try and sell cheap EPDM rubber liner that’s actually made for roofing.  Containing toxic chemicals that could kill wildlife, pets, fish and plants.  Look for a stamp specifically stating that it’s fish safe.

Flexible rubber pond liner is usually sold in 30 to 60 mil thicknesses.  PVC pond liners are generally 20 to 32 mil.  Keep in mind the thicker the liner the better.  But, as thickness goes up so does the price.  You get what you pay for.

If you want a water feature that will last for many years a thick quality liner will be money well spent.  If you plan on possibly changing the water feature in a few years a thinner cheap liner will be fine.  This applies to warranty lengths as well.  No need today extra for a 20 year warranty if you plan on replacing it in 5 years.  A 10 year warranty that usually comes with a PVC liners will be more than enough.

If you live in an area with harsh winters you’ll want a thicker pond lining to withstand the freezing and thawing cycles.

Yes. The best pond liner material is really dependent on the application and budget. Here is a breakdown of the cost of pond liners available:

Pond Lining Material

  • Cost – Generally $.35 per square foot.
  • Advantages – A cheap pond liner.  Which is acceptable for bogs/wetlands, really large ponds, temporary projects, etc.
  • Disadvantages – Tears easily and isn’t very flexible.  Polyethylene liners cannot be seamed together without expensive welding equipment.
  • Comments – Be cautious with how you use polyethylene and other discounted pond liners.
  • Cost – Generally $.50 per square foot.
  • Advantages – A fairly durable liner. That’s pretty widely available and usually comes with a 10 year warranty.
  • Disadvantages – Doesn’t handle freeze/thaw cycles well (you shouldn’t use this if your area gets harsh winters), or seal as good as EPDM or rubber pond liners.
  • Comments – Make sure the PVC pond liner you buy is made specifically for water features.
  • Cost – Generally $.60 per square foot.
  • Advantages – Usually comes with a 20 year warranty and is very durable.  Most EPDM pond liner for sale can be installed during and withstand cold temperatures.  More resistant to UV-light than cheaper liners. Flexibility allows it to easily have irregular shapes and conform to the nooks and crannies in the application.  Large boulders can be placed on top of EPDM rubber pond liner without worry.
  • Disadvantages – More expensive.  Seaming EPDM pond liner together requires the right weather conditions.
  • Comments – Use only fish safe EPDM liner.
  • Cost – Generally $.62 per square foot.
  • Advantages – A good alternative if you need a large pond liner over 50’x100′.  45 mil polypropylene pond liner is generally more durable than 45 mil EPDM pond liner.  Can be seamed together using a standard heat gun in the field.
  • Disadvantages – More expensive.
  • Comments – Use only fish safe EPDM liner.
  • Cost – Generally $.80 per square foot.
  • Advantages – A heavy duty pond liner.  Most of the time butyl rubber pond liners come with a 20 year warranty, but should have no problem lasting 50 years or more.  Best choice for areas with harsh winters.
  • Disadvantages – Can be hard to find and is the most expensive.
  • Comments – Comes in 30 mil and 60 mil thicknesses.

Yes and no.  If you have any sharp tree rocks, rocks, etc.. then it’s always a good idea to use underlayment.  Also if you are digging into the ground you should always use pond underlayment.  As it allows any gasses to escape easier.

Flexible rubber pond liner is susceptible to punctures from gravel, rocks, or sharp tree roots.  You should protect the liner.  Based on your site conditions you may need a couple inches of sand underneath and some layers of pond underlayment.

You generally do not need underlayment in waterfall and stream areas that has good soil underneath.

Installing flexible rubber pond liners is pretty simple.  Depending on what you’re building it’s basically just spread the underlay (if you’re using it) and liner over the hole, fill it with water, and tidy up the edging.

Tip – Save the scrap liner you cut off.  You can use this at a later date for patching if needed.  You can also use them for plant pockets.

Many people assume that one solid sheet outdoor pond liner is stronger than two pieces that have been seamed together.  Elongation and strength tests actually show that non-seamed areas usually fail first.  Factory seams are actually the strongest point of the liner.

UV-Light is the major culprit in the deterioration of most landscape pond liners.  Manufacturers will warranty the liner for how long they think it can hold up to direct UV exposure.

If you cover the liner with rocks or gravel it should extend the liners life well beyond the warranty period.


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