Pond Liners And Sealing A Plywood Tank

[Scatocephalus]

Has anyone ever built a plywood tank and sealed it with pond liner by adhering liner to the individual components first and then assembling the tank? Not just laying the liner in an already assembled box.

Basically placing a rubber liner on each panel and then assembling it.

Not sure what type of sealant you would use as silicone doesn't stick to the pond liner. I have seen liner patch kits. Perhaps assembling everything and then running strips of liner patch in the corners? Perhaps construction adhesive?

I already have the pond liner so it would be cheaper for me than buying fiberglass, epoxy or sanitred.

 

[Celtic Samurai]

I am not sure I would do it that way Mark. You are creating numerous places for the seal to fail. A one piece liner will not have that problem.

Just my two cents.

 

[toehead11183]

why would u do that?

 

[Dr Joe]

Has anyone ever built a plywood tank and sealed it with pond liner by adhering liner to the individual components first and then assembling the tank? Not just laying the liner in an already assembled box.

Basically placing a rubber liner on each panel and then assembling it.

Not sure what type of sealant you would use as silicone doesn't stick to the pond liner. I have seen liner patch kits. Perhaps assembling everything and then running strips of liner patch in the corners? Perhaps construction adhesive?

I already have the pond liner so it would be cheaper for me than buying fiberglass, epoxy or sanitred.

Once...I made a 300g that I could break-down and carry back into the back country (for collection) doing the same thing you are suggesting, I just didn't permanently seal it after assembly.

Make the box as accurate as if you were going to seal it with paint. (don't count on the liner to make up for poor craftsmanship )

If your using EPDM liner, use the sealer for the patch kit. Coat both contact edges before assembling.

Dr Joe

.

 

[Scatocephalus]

why would u do that?

Because...

A. I already have the liner. Free and half is cheaper even than one penny.

B. I don't want a bunch of liner crammed into the corners. Applying it to the wood and then assembling would look much nicer.

Any other sage advice?

John, I understand but I have to make things as difficult as possible...

Dr. Joe, Thanks for the advice.

 

[fishdance]

I think you could use some thin strips of 3mm thickness neoprene rubber between the liner and wood to give you a watertight seal. Use the neoprene as backing along the join/seal areas to raise the thickness of liner. Joins will compress into a watertight seal without need for silicone or other glue. I use neoprene sheets to waterproof viewing panels on 3 foot deep A/G pools (with nuts and bolts) so this may work for you....? Worth a try since neoprene strips are cheap.