GE Silicone I question.

[Cannoy]

I bought GE Silicone I for putting walls in my sump because I read everywhere that this is what people use. After reading the label I see that it says not for aquarium use. Is it really not safe?

 

[StirCrayzy]

Silicone 1 is Safe, and has been used in tanks for years. I think they print that on the label for liability purposes.

If I were building an entire tank, I would use something stronger, but for sumps and small projects it's plenty strong.

 

[Cannoy]

Ok. I actually put the sump together last night, says wait 24 hours for full cure so should sometime tomorrow be safe for me to fill the tank. I will be close to 48 hours after i put it together.

 

[Varga]

I've used GE1 with zero issues. 48 hours would be perfect, but also depends on how thick you applied it.

 

[Cannoy]

Its pretty thin, just enough to hold baffles in place.

 

[Squatch XXL]

I have used it with no issues in the past. 2-4 days dry and cure time....the more the better....But I have gotten it wet without issue in less than 24 hours during an emergency issue.

 

[DaveK]

Some types of silicone have mold and mildew inhibitors in them. They should not be used in a reef tank. They are usually the products made for bathroom or kitchen use, where you might have mold or mildew.