Firestone W56PL452020 EPDM Rubber Pre Cut and Boxed Pond Liner, Midnight Blue, 20-Foot length x 20-Foot Width x 0.045-Inch Thick

I used it to waterproof a second story deck floor for a utility space under it. Excellent product. Heavy duty, strong, and durable. Worth the price.

Installed without any problem , and was able to install it across 2 ponds and join it at a steam without leaks . The only downside is it's heavy really heavy , I'm hopeful I'll get close to 30 years out of it , time will tell.

Should have went with this to begin with. If youre serious about making a pond, spend the money and get the good liner!! Will take 2 people to lay this one into place properly. Its heavy! No leaks!

This liner came in a well packaged cardboard box, folder many times, but realize the 20x20 size is super heavy. It took four people to properly move it into place. If you have a very irregularly shaped pond, like I did, you will need to spend some time trying to get the folds to look reasonable, which is harder than one might expect. Part of this is due to the thickness of the material.I recommend you only start laying this during the cooler parts of the day, as it gets super hot in the sun.

Super happy with the company and the after sale to give good advice!!!!

Appears to be very durable - heavy weight. Remember, you get what you pay for. Last liner was cheap, much thinner, made of vinyl, only lasted 8 year. Had become very brittle, developed holes, and leaked. This product is supposed to last 20 years. I think it will. Time will tell. So far it works well. I love it.

Delivered earlier than expected, a little heavy to handle alone (20x20)

Tough to maneuver solo as an able bodied young man.Way more durable than my previous liner, highly recommend EPDM.Mine had no holes or imperfections, just a folded up rectangular piece of material as advertised