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Have questions? Give us a call: 323-433-1540
Have questions? Give us a call: 323-433-1540

Pond Underlayment

67 reviews

Product Weighs: 3.0 lb

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Add extra protection and peace of mind to your pond, your investment.

  • Increases pond liner life and is quick and easy to install.
  • Protects from sharp objects and prevents ground under liner from over-stretching. 
  • Made from 100% polypropylene non-woven material, will not mildew and is resistant to damage from insects and rodents. 
  • Material weight: 7oz


*Width is always 15ft wide. Pieces can be overlapped and come cut to help with placing. 

How to Determine the Size Underlayment You Should Buy:

1.) Determine the total sq ft of your pond liner: Example 20'x30' = 600 sq ft

2.) Divide the total sq ft of your liner by 15 (this is the width of the rolls they come on): Example 600 sq ft / 15 = 40 

Example: You would need to purchase a 15'x40' underlayment 

Customer Reviews
4.9 Based on 67 Reviews
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Filter Reviews:
Matthew H.
United States United States
The underlayment is impressive

So I bought the pond liner because they recommended it- didn't know if it would be worth it or not but wasn't a terrible amount of money. Boy it was an impressive product. It felt almost as thick as craft store felt, but made from some type of polypropylene or similar. I first tried to cut it with a brand new utility knife and couldn't get the blade in (yay, though it led to a brief panic), oddly cut perfectly fine with scissors.

Dean B.
United States
Pond liners and underlayment

Using it was as expected...very heavy (20'x25') but got it done. (Underlayment much easier.) Holding water and fish ad it should. Delivery was unusual, Fed Ex got it to their distribution plant, but I had to pick up due to weight. JPL made it right with a generous refund on shipping. All Good.

michael f.
United States United States
Liner and pond plastic

Great product, decent price.


Thank you for your review Michael. I hope your project went smoothly too.

Lisa L.
United States United States

Great good stuff


Thanks for your review Lisa. Our EPDM is absolutely some great good stuff :)

James G.
United States United States
Pond underlayment

Great underlayment