Filling gaps before applying Pond Shield

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Ozkar

Candiru
MFK Member
Jan 5, 2007
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Baltimore, MD
I am in the process of building a 3000 gal. wood frame and plywood tank with acrylic windows. The wood is mostly done and it is time to apply the Pond Armor / Pond Shield.

I need to fill in some 1/4" gaps in the plywood before applying the pond shield. Is it OK to use any paintable sealant that is durable and stays flexible? Or do I need to worry about the Pond Shield epoxy attacking some cured sealants? Are there any other concerns here that I am not thinking about?

The Pond Shield web site has "Sikaflex 1a" listed on their web site for purchase just for this purpose, but when I went to order the site said the product was unrecognized. Does this stuff have to be used? Or can I just get some "DAP Dynaflex 3.0 Advanced All Purpose Sealant" from Home Depot?

Thanks,
Ozkar
 
Safest bet is to contact the manufacturer, PondArmor has actually logeed on here to help with some situations and offer samples at one time http://www.monsterfishkeepers.com/forums/showthread.php?t=53565 , Nice people to talk to too.

With this commitment you want to do it right the first time.

Keep us posted and how about some pix?! :D

Dr Joe

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you can get sika flex at most marine / boat stores. call pond shield they have good tech support.


if the gaps need to hold water pressure you can cover them with fiberglass cloth and epoxy before the pond shield
 
When I asked Pondarmor the same questions, Butch only recommended two things: A high quality performance non shrinking putty for small cracks, and hydraulic cement for big cracks.

They suggest not using any sort of undercoating.
 
spiff;2172432; said:
When I asked Pondarmor the same questions, Butch only recommended two things: A high quality performance non shrinking putty for small cracks, and hydraulic cement for big cracks.

They suggest not using any sort of undercoating.
Click to expand...

i assumed these were not cracks but simply gaps in the wood work ......:confused:
 
johnptc;2172463; said:
i assumed these were not cracks but simply gaps in the wood work ......:confused:
Click to expand...


Correct. But the concept for repair should be the same. I might just add the suggestion for defining a "small" crack as anything under .25inch, as I found evidence of the DAP high performance putty that I used still shrunk a tad in applications larger than that. You might be able to minimize this shrinkage by doing lots of coats versus the 2 or 3 that I did.

But I found the hydraulic cement to be the most useful for everything, even small cracks too. The only disadvantage to the stuff is that you can't do any followup preparation to it like sanding, ect. But its bullet proof once cured. You literally have to chisel it out if you need to redo anything. It also seems to expand a bit when curing, which helps in it becoming firmly wedged where ever its being used to fill.
 
Thanks for the input guys.
I decided to cover the gaps with wood trim. I will also fill a few small gaps in the plywood surface with DAP Dynaflex 3.0.

I have been taking some "progress" pictures of this project with my cell phone. When I figure out how to best get the photos off of my phone, I will post them.

Thanks again,
Ozkar
 
I'm curious how you covered the gaps with trim. Are you planning on the Pond Armour covering the trim and sealing it?
 
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