How to repair crack in preformed pond

[jim c]

The weight of large waterfall stone cracked my preformed hard plastic pond. It extends 4" vertically from top downward causing a leak. The Ace Hardware associate told me there is no glue that will repair this "greasy" type plastic. Whatever I use will peal right off when dry, including silicon.

Waterfall disassembley is a major chore and I only want to do this once.
Can anyone recommend a product that will work the first time?
Thank you
Jim

 

[addy1]

I fixed one with p.l. roofing goop from home depot and a piece of liner
http://m.homedepot.com/p/Loctite-PL.../203163733?keyword=Pl+roofing&searchtype=text
Clean dry sand it to rough it up.
Then use a lot of goop in the crack extending out. Press down the piece of liner in the crack and out 2-3 inches Use the goop to cover all edges of the liner. Let dry well.

My fix lasted for years. Mine was on the shelf curve.

 

[Meyer Jordan]

Depends on the type of plastic.

 

[jim c]

Sounds like a plan Addy. I'll never know what type pf plastic it is....
We'll see if I get any other members that had same problem and what their solution was

 

[jim c]

Just spoke to salesman where I purchased the pond. They do not have repair kits for this.
It is made from
Polyethylene

 

[RobAmy]

You can try a welding kit, use for kayaks. It does work on kayaks but never tried it on a pond application.

https://www.amazon.com/Hobie-Welder-Pro-Stock-72097001/product-reviews/B004CGCY34

The KC Welder Pro has an 80 Watt element, flat tip and a 3/16 in. hole in tip for repair rod insertion. Includes a selection of Hobie color welding rods. Fix holes and cracks or customize polyethylene products. Insert the rod into the tip and place against the product to be welded. The tip heats the plastic surface and the rod. As the materials melt, move the tip along the repair area while pushing the rod into the tip to fill the repair area with new plastic material. Plug small holes after moving accessories. Rebuild keels after excessive wear from dragging

I make no promises but it does work on Polyethylene

 

[morewater]

Liner patch or EPDM seam tape. Coat unit with liquid EPDM. Or simply line with 30mil EPDM liner (thinner so easier to fold/pleat). Easy repair.

Alternately, you can pop-rivet a piece and then "weld" with Plastex 3000 resin.

 

[brokensword]

if this were my repair, I'd drill a small hole at the end of the crack to 'stop' it from any further spread before I made any patchwork. Just my thought.

Michael

 

[Lisak1]

Just my thought.

Agreed. Once those cracks start, they want to continue to the ultimate conclusion.

I like the idea of using a piece of EPDM - you'll be guaranteed leak free if you line the waterfall course with it.

 

[jim c]

So many ideas. i will ponder which to try.
My garbage can is same material, I'll experiment on it first.
Friend of mine said I should try "flexseal" as seen on TV.
Thanks everyone for your great ideas.
I'll get back to thread and let everyone know what I used and how it worked.

 

[jim c]

Well I carefully considered all the solutions and decided to go with the patch.
I found a kit product called " Tite Seal Black Self Adhesive EPDM Rubber Pond Liner Patch Kit"
Purchased on eBay for $17 including shipping.
Claims it will work on Polyethylene which was my biggest concern.
Wont be able to try it till ground thaws, but I'll be back to let you know how it worked.
Jim

 

[adavisus]

melting a glue stick over a split in a dimpled plastic tub, sanded to roughen the area seems to be holding water in a three foot deep tub here

 

[sissy]

never had luck repairing a preformed after they cracked when I took them out

 

[carolinaguy]

Go to a website for welders. My welding book says you can weld plastic. Haven't yet read how. Putting the patch on the inside of the plastic makes sense, but I don't know how you stop the crack from spreading.