Silicone not curing

By not cured are you talking still cloudy? If thats the case give it time. Stick it in a room with a dehumidifier. Dont add water while itsnot cured. The silicone will be water proof in 24 hours but it nor fully cured the pressureol of the water can cause malformation of the caulk.

 

Give it at least a week IMO, make sure its fully cured and there's no odor lingering. Filling too soon can also cause leaching of chemicals into the water which can kill any live stock you add. Err on the side of caution and give it plenty of time, keeping in a hot space will help speed it up also, garage etc
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If its thicker where your having trouble with it curing it is typical. Silicone cures by evaporation rather than reaction such as two part epoxy. It would be bad If you were seeing an issue with epoxy not curing, likely would be a lack of curing compound/ hardener.

 

Yup it needs more time and if you can a room with less moisture. Especially if it's a little on the thicker side of a silicone job. I once did a 75 bow that was nice a tall (very cool dimensions) but the bottom was just deep and the air down towards the bottom of the tank stays a bit more stagnant, so after putting a fan on it it sped up a bit. But that tank with a heavy silicone job took 3 days to dry and a full week to cure. While other larger tanks have taken less. I wouldn't push it though, time is a good friend of yours when your messing with this for a tank. /DesktopModules/ActiveForums/themes/_default//emoticons/wink.gif