Is GE II silicone chemically safe once it's cured?

glb · Dec 26, 2016

I just realized I used GE2 for my sump baffles. It says 100% silicone but also says it is mold resistant. The tank isn't running yet. I read on another post that you said 2 did a neutral cure? Mine has been cured for months. I'm thinking I should redo the baffles but wanted to double-check, because that's going to be a job. At least I saw this before there was water in the tank! What do you recommend?

Joey waid · Dec 26, 2016

I have used many types of 100% silicone in tanks and such with no issues once it's dried. I think the silicone is mildew resistant by nature where caulking is not.

Randy Holmes-Farley · Dec 27, 2016

I am not sure of the answer.

glb · Dec 27, 2016

Randy Holmes-Farley said:
I am not sure of the answer.

Thanks Randy. I went ahead and bought DAP aquarium-safe silicone to redo the baffle walls. After all the time, effort and money put into this build, it's not worth it to leave it and then worry. Fixing it before there's water in the tank could save lots of headache later.