Gorilla Waterproof Patch & Seal Tape 4 x 10 Black, (Pack of 1)

I used this to add to the top of my formal pond liner, that had shrunken down about 2 over the last 6 years. The liner is regular pond liner, and is somewhat stiff/crispy, but its in a concrete block pond, so I think I can get a few more years out of it. I really only needed 2 at the top, but decided to use the entire 4 width of the tape. I cut each side to the size I needed + 2. I then rolled it up, peeled back the protective sheet as I went, about 4 at a time. These were 5.2 long strips, which was somewhat intimidating when you know you cannot reposition. And you cant. Once its on, its on. I cleaned the liner first, removing any algae, and then cleaning off again with alcohol before I put the tape on. If you figure out how to unroll and remove backing at the same time, as I did, this was an easy job. The tape is holding very well, and I cannot imagine the reviewers who say the backing was dry. No way. They must not have removed the backing. The edge of the tape has a visible line of adhesive, but its under the waterline so I dont care. Anyway, time will tell if it last. But it will probably outlive the liner. Good job, Gorilla.

better than oem tape used to cover auto underbody sheet metal holes.

Bought to seal hole in water hose. Stuck great, fit snug but as soon as the water was turned on the tape split and water came pouring out the hole again.

This works underwater and is just as effective as a vinyl patch. If you want something quick and inexpensive to fix a hole in your vinyl above ground pool liner this is your ticket.

We live in an RV. I had to make quite a few cuts to repair things under the RV. This product is ridiculously easy to install and at the same time extremely difficult to remove. That is what you need in a product like this. I wish I had purchased something like this from the beginning instead of going the cheap route originally.

This product did not work when trying to stop a leak in a hose Used on other surfaces with no problem.

Product stopped my sink leak for about 15 minutes and then it came back, I followed the instructions perfectly. Unfortunately this product will not work for all leaks and it is extremely difficult to remove, almost like a putty.

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Put it over a gapping threshold from a covered porch to a sunroom. Keeps water out. Great fix in a bind.

Ive had koi ponds for 35 years, and this is the best stuff Ive ever tried.