PDA

View Full Version : Styro qestion



BillyVille
03-10-2008, 03:39 PM
When making decor out of styrofoam, instead of using 2 part epoxy to seal after concrete is applied could I just take some silicon and brush it all over it? or is it to thick to work with?

Tooch
03-10-2008, 03:46 PM
You could always just simply use aquarium silicone if you'd like.

BillyVille
03-10-2008, 03:50 PM
I just thought about it, because its too expensive for the 2 part epoxy where I live, and silicon is so cheap. It would seal it up good and keep everything in, but would it effect the look of my concrete?

BillyVille
03-10-2008, 07:59 PM
Nobodys tried this?

sailor
03-10-2008, 08:04 PM
The silicon would dry with too many brush strokes I think, which would really show up after the algea started to grow on it. Plus it would take a lot of silicon for full coverage. I think it would peel of easily as well.

BillyVille
03-10-2008, 08:12 PM
Anyone know of anything else I can use besides 2 part epoxy?

angelcakes
03-10-2008, 08:25 PM
i dont know if this link would help but hes done a good job with the styro:14:

http://www.aquariumlife.net/projects/diy-decoration/17.asp

BillyVille
03-10-2008, 08:33 PM
He didnt use anything to put on as a sealant over top the cement! Wonder if it will hold up forever in water??

angelcakes
03-10-2008, 08:36 PM
sorry it didn't help,:ssad:

BillyVille
03-10-2008, 08:41 PM
No man thanks! Makes me think I dont even need to use anything but styrofoam and cement!

angelcakes
03-10-2008, 08:45 PM
oh good glad it did help,his design looked good :22: good luck with youres will be nice to see some pictures when your finished,:19:

krisco
04-22-2008, 03:14 AM
Yeah, I have seen many people across the net that did not use any epoxy in the end. I probably will not either. Don't know how it will hold up over long lengths of time, but we will see.

His design did look great. Very nice 3d sculpting.

calix10
06-24-2008, 02:00 PM
Try with transparent acrilyc i do on my own diy backgroun, after the cement i apply the spay the i let'm dry about 2 Days then soak in to water for 1 week and thats it
No problems until now

adamb_94
03-01-2009, 08:05 PM
Wow pal, think again!
It may hold up for a days, weeks, maybe months...but not years for sure! It all depends on how well your concrete cures. When concrete cures, surplus water moves to its surface, leaving behind a network of interconnected capillaries. Concrete is more porous than Swiss cheese typically 12% to 18% air. You will want a sealer for sure!
I also recommend using a Hydraulic Water-Stop Concrete from Quikcrete.

jb300m01
03-02-2009, 01:21 AM
I have a rectangular piece of foam siliconed to the back right corner of the tank. I used aquarium silicone to seal it. That was about a year ago and there is no deterioration of the foam what-so-ever. However, the top is covered by play sand and the sides are hidden by rocks. I haven't noticed any breakdown of the foam.

adamb_94
03-02-2009, 04:49 AM
the foam won't break down as much as the concrete will leak which can cause problems. If its a simple background and your not worried about your fishes too much then sure go ahead and don't fill the poures in the concrete