The friendliest place on the web for anyone with an interest in aquariums or fish keeping!
If you have answers, please help by responding to the unanswered posts.
I have actually done a lot of reading on this lately. That should be just fine as long as its 100% silicone and doesn't have an anti mildew agent in it. (Dow, as well as 100% typically doesn't). Aquarium safe labeling typically means that it doesn't as well. Hope this put your mind at ease.
Most silicons will not work because they can't handle the pressure of the water (they will work for a short period of time but after the tanks leaks will get worse)