What kind of adhesive do I use to fix a Toilet tank that was cracked so it doesn't leak... I forgot to put antifreeze in my tank while I left my cabin and the tank cracked and got water all over. Now I have a Tank that is very hard to replace because the rough in from the wall is only 9inches from the wall (Because it's from a trailer) I want to just repair the tank if possible since the crack is in the back it should be OK... but I don't want it to leak once it's repaired... Any Suggestions?