We have a leaky toilet valve in our rental condo. It's old and will be replaced, but not until some time next week when the condo office shuts off the water in the building. In the meantime, we put a small bucket under the valve but it gets full in about half a day. Is there any way to seal it until it gets replaced? For example, can it be some sort of material, spray or not, that can be used to coat the whole darn valve? Some sort of caulk-type compound that would harden and not let any water out? Otherwise we will have to drive across town twice a day to empty the bucket... Thank you in advance for any pointers!