Appropriate Silcone Caulk for sealing a tank.

Itsadeepbluesea

Itsadeepbluesea

Goliath Tigerfish
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Apr 6, 2008
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Hey all. I will be attempting my first ever reseal of a tank coming up and I wanted to check to see if my caulk would be safe. I did research online on it and it seemed to be ok, but I wanted to check with the forum as well. It's GE clear all purpose 100% silicone. I doesn't appear to be the mold resistant type.

It would be the type in the link below:

http://reviews.truevalue.com/9048/4...pose-caulk-bronze-10-1-oz-reviews/reviews.htm
 
fishguy306

fishguy306

Peacock Bass
Community Vendor
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Oct 24, 2005
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GE I or II doesn't matter. Silicone is inert once fully cured. Assuming you are giving it 10-14 days as you should to fully cure it wont leach anything into the water. That said, I'm sure several people are going to argue this point which really doesn't matter.

What matters is you shouldn't be using GE I or II for building or resealing a tank. Once again, many people will argue that it is ok to use, however if they look into the msds for them they will find that there is no strength at all with GE I or II, so low that the strength is not even listed. Both are sealants, not adhesives. You want to use the Momentive RTV 103 or 108, 103 is black, 108 is clear. This series is an industrial grade adhesive used by the majority of major tank manufactures.
 
fishguy306

fishguy306

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Oct 24, 2005
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Wow much is that jsodwi? I've never heard of it before and was curious what it runs. I do completely agree though, why cheap out when the silicone is working to prevent thousands in damages? The silicone I mentioned runs about $13 a tube, not cheap, but a hell of a lot cheaper than having a tank burst.
 
xraycer

xraycer

Arapaima
MFK Member
Sep 5, 2013
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Wailua Boy said:
Mold inhibitors aren't fish safe. Do you use mold inhibitors on your reseals Xraycer?
Click to expand...
Yes, I know that brah. My only point is that supposedly GE I doesn't have mold inhibitors while GE II does. So, point being, that because a package is labeled 100% silicone doesn't mean that is all that it contains. Whether mold inhibitor in silione is harmless or not is for another speculative debate. Aloha
 
xraycer

xraycer

Arapaima
MFK Member
Sep 5, 2013
5,383
2,571
203
Southern NH USA
fishguy306 said:
GE I or II doesn't matter. Silicone is inert once fully cured. Assuming you are giving it 10-14 days as you should to fully cure it wont leach anything into the water. That said, I'm sure several people are going to argue this point which really doesn't matter.

What matters is you shouldn't be using GE I or II for building or resealing a tank. Once again, many people will argue that it is ok to use, however if they look into the msds for them they will find that there is no strength at all with GE I or II, so low that the strength is not even listed. Both are sealants, not adhesives. You want to use the Momentive RTV 103 or 108, 103 is black, 108 is clear. This series is an industrial grade adhesive used by the majority of major tank manufactures.
Click to expand...
fishguy306 said:
Wow much is that jsodwi? I've never heard of it before and was curious what it runs. I do completely agree though, why cheap out when the silicone is working to prevent thousands in damages? The silicone I mentioned runs about $13 a tube, not cheap, but a hell of a lot cheaper than having a tank burst.
Click to expand...
Back for round 2 of "Your Tank Will Burst If You Use GE Silicone" rant? LOL
 
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