Great Stuff?
 

If I am not mistaken the stuff in the red can is reef safe? I tryed doing a search but the words "great" and "stuff" are pretty common. Can anyone confirm this please?

http://greatstuff.dow.com/products/gaps-and-cracks/

A quote from another forum.....
"There was a huge thread on RC about this. Some people have had success with this but a member contacted Dow and asked them what effects would a saltwater tank have on it. It is reef safe, yes...but the manufacturer stated that the salt will eventually deteriorate the material."

I used a different product than great stuff. Although I hear you can use it, just make sure it is black in colour. I hear the yellow will break down after while. I'll post a pic of what I used when I get home tonight.

Further reading on this subject: http://reefkeeping.com/issues/2003-08/nftt/index.php

There's a black spray foam that is marketed for ponds (rock work) that works too. Sold in most garden centres and some home depots.


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Thanks. Im 99.9% sure that the yellow is safe, I have seen it for false wall build threads, its just difficult to search for.

Thanks. I have looked through your thread, I knew you did the same thing that I want to do, and saw the pond foam you used. Brand name would be good though and place of purchase.

Thanks Kien. That's the link I was thinking of.

Whoa.. déjà vu..

I think it was called aquaseal waterfall foam, bought it in town here for about $16 a can. Again, I'll confirm when I get home.

Aquascape
 

http://store.aquascapeinc.com/produc...ber&t=1&i=all&

Sorry for the late reply, but this is what I used.

Thanks for hte reply. How tacky is it? I tryed the the Great Stuff last night but its not sticky or thick as I thought it would be. Is that stuff thick enough to hold rubbel?

Not vertically. Basically what i did was laid the overflow on it's side and did one side at a time. As for being sticky, I strongly recommend you wear plastic gloves. This does adhere to everything and was a bitch to get off my hands. Once it expanded for a few minutes, I just threw on the rubble followed by some sand. Worked well.
Are you building a back wall?

Thanks. I have 2 colums built with PVC, and an arch connecting the two with larger rubbel zip tied on to it. What im trying to do is fill the gaps and stick rubbel on. The arch has a hole in the middle that im trying to keep there. I might have to foam in the gaps then drill it and use rod and silicone to finish. I cant find my camera charger battery otherwise I would throw up some pics. Hope that makes sense.