In our spare restroom, the tank cracked in two places. We emptied the water, but I'm stalling on replacing it now. One crack originated by the flush handle, the other part way down from the other side, but not all the way to the bottom. We used a strong tape just to keep it from cracking further, while still unused and empty of water. I know the right thing to do is just replace it, but is it possible to use a spray rubber sealant both inside as well as outside? After sealing, I thought of using a strong tie-down, the type that you ratchet a web belt to tighten.
Am I nuts for thinking this might work as a temporary fix?

Am I nuts for thinking this might work as a temporary fix?
Basically yes.

Just think how much damage will be done when the tank cracks more.

The fill valve doesn't shut off just because the water is running out on the floor.

Thanks for the speedy reply. I must be psychic because I got the answer that I had expected.
I know first hand about water running all over the floor. A few years ago, the water fill hose to this same toilet broke where it attaches to the shut-off valve. Thankfully, we were home, and although I had a huge mess that ran into the next room ( I should say gushed, I had my own personal tsunami), I'd hate to think of what might have happened otherwise. I found it flooding only because I walked into the adjacent room. I think this toilet is cursed. I must have really pissed someone off in a former life.
Thanks again.

Her's a tip. When replacing the tank purchase the same brand of tank. That way you can use the old bowl and not have to purchase a entire tank and bowl. Good luck, Tom

Maybe not nuts but do you really want to depend on this to keep your house dry? Some brand tanks are retrofitable, but depending on the age may be a 2 bolt or 3 bolt tank. Hard to find a full flow tank anymore. Personally, If the toilet is not a low flo, replace it and save money in the long run. You would waste more time futzing with a cracked tank.

With that experience I'm surprised that you would even consider trying to patch up a cracked tank.


I must have really pissed omeone off in a former life.

Could be, or could be that stuff just happens. With your luck, I sure hope you turn off the water when you go away on vacation.

Thanks for the replies!
Being queen of this castle, I'll need to upgrade my throne...