Make sure you wait long enough to dry out the silicone and test fill it for a few days before moving the tank into living space.
I hate to tell you one horror story happened to my fish friend many years ago. He bought a used 500 gal tank that measured 8'x4'x2'. There was one boo boo though, a small chip on one edge, so he resealed it with silcone. I didn't know how he did it, whether he removed the old seal and ressealed it, or he just added an inside reinforcement seal. I didn't know how long he waited for the silicone to dry out, but I did know he didn't test fill it, just filled up 500g of water right away in his family room. The **** tank is so heavy that it needs 4 people to lift it, so moving in and out for test filling isn't an easy task. He spent the whole evening setting up the tank and transferring dozens of his priced Affican cichlids from his old tanks into the 500g tank. It took him till midnight to get done and he was so happy that the tank was holding water and looked fantastic. So he went to bed with great relief. But in the middle of the night around 3:00 am, he heard a dam break and 500g of water, fish, gravel and rock gushed out of one side of the tank that yielded. Some furniture was literally floating. There was nothing he could do to stop it, except to rescue his fish that were bouncing on the floor and transfer them back to his old tanks. The rescue mission was done till day break and he still had to go to work shortly afterward with no sleep. He and I lived in West Palm Beach, FL at that time, so it's not too far away from you. Soon after the acident, he gave up his fish keeping hobby.
It's a lesson that buying big old tank is not necessarily a bargain, but potentially a big liability if you don't thoroughly test it out.