Is GE Silicone bad?? - The Planted Tank Forum

 
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post #1 of 10 (permalink) Old 06-22-2004, 07:30 PM Thread Starter
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Is GE Silicone bad??

I just repaired a tank I have. It had a strange slice on the bottom edge so I sandwiched Two small pieces of glass on the outside and inside. looks good I let it dry for four days now. I thought I remember reading 100% GE silicone is allright. but now I am not sure. There is not that much of it exposed to the water. I have about five gallons in there to check for leaks. I dont see anything about mold preventers but now that I read the small print it says not for aquariums. Anybody use it with good or bad luck??? Please tell me its OK.
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post #2 of 10 (permalink) Old 06-22-2004, 08:23 PM
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Its difficult to say.. If it says "not for use with aquariums" I wouldn't trust it... Thats just me though..
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post #3 of 10 (permalink) Old 06-22-2004, 08:30 PM
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I've used it.. No problems. Just make sure it's 100% silicone and no silicone blend for caulking bathrooms and the like, as they won't give you the bond you want.

I've seen a few debates on Usenet about all but "Aquarium silicone" containing cyanide and other crap that'll leach out and kill everything. Personally I think that's a big load - they're going to sell a caulk for kitchen and bathroom use that leaches out cyanide? Please... If there are near-zero amounts of things leaching then activated carbon and water changes should be extracting it before it hits a harmful level, anyways.

That said, I've built several terrariums with it and one of my toads is now... 11 years old or so. I'd say if it doesn't kill a sensitive amphibian it's probably not going to affect fish or plants.

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post #4 of 10 (permalink) Old 06-22-2004, 08:43 PM
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Speaking from personal experience... I have killed off a tank full of fish because I used silicone that contained "something"... Now that was a long time ago however (10 years) so I never thought to make note of what brand.. But it has changed my paranoia levels considerably since then.
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post #5 of 10 (permalink) Old 07-08-2004, 06:26 PM
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If you used something with a mildewcide in it that would explain the toxic effect to your fish.

100% silicone is supposed to be safe so long as it is fully cured before adding any water to it. If you still smell that vinegary odor then it's not fully cured. The 'not for aquarium use' could be a basic CYA statement in the label since it's not being sold as an aquarium repair/construction product (for that they repackage the 100% silicone into smaller tubes and sell it for more $$$ at pet stores )

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post #6 of 10 (permalink) Old 07-08-2004, 07:52 PM
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GE makes multiple formulations of their Silcone. The ONLY one that is safe for aquarium use has the GE Part Number of SE - 1124. All the other clear ones have a fungicide and will kill your fish.

Remember that is GE # SE - 1124

DAP also has a Silicone that is aquarium safe and it does say it on the package.

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post #7 of 10 (permalink) Old 07-25-2004, 05:42 PM Thread Starter
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Since I posted this thread over a month ago I figured I would give my experiences with the silicone I used. It was GE silicone 11 . I let it dry for almost a week. Then I added water.I have not had any ill effects from it and all seems fine. No Leaks, No dead fish. I still would be cautious if using a lot on all the seems. In my case most of the silicone was sandwiched between two small pieces of glass and then sealed on the edges. This was my experience with it and would use it again for a small repair if needed.

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post #8 of 10 (permalink) Old 07-25-2004, 10:15 PM
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Look on the tube for food safety notices, if it says safe for food use, it's probably OK. I use DAP myself, it says not for continuous underwater use but one of my 29s has had a bottom replaced 6 years ago and hasn't had a problem.

Sometimes manufacturers put disclaimers on a product to avoid liability, sometimes they do it to drive the consumer to a higher priced product that may or may not be a different formulation.

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post #9 of 10 (permalink) Old 07-25-2004, 10:41 PM
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The MAIN thing, is that you need to make sure it doesn't contain any "anti-mildew" additives or anything like that. If it has that, then they're going to advertise it on the tube, so if it doesn't say, then probably you're safe. If it is indeed 100% silicone, then you're ok.

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post #10 of 10 (permalink) Old 07-25-2004, 10:49 PM
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Quote:
Originally Posted by gnatster
GE makes multiple formulations of their Silcone. The ONLY one that is safe for aquarium use has the GE Part Number of SE - 1124. All the other clear ones have a fungicide and will kill your fish.

Remember that is GE # SE - 1124

DAP also has a Silicone that is aquarium safe and it does say it on the package.

-*-*-*-*
gnatster
I wouldn't be SO alarmist if I were you. Have you experienced this apocalypse first hand?

I've used 100% silicone from GE (9 month ago), that was not recommended for aquarium use, and haven't had any problems.

I believe that glass-garden and Cich are 100% right on this.
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