We have a leaky downstairs sink. The leak is right in the drain itself, if you look under the sink it’s leaking out around the grout, above the U-bend.
I was thinking this might be perfect for “flex-seal”, or one of those other spray-on-rubber-sealants. After reading some reviews, some people are skeptical… but they seem to be trying to fix MUCH more difficult things than my sink, or complaining about things like the appearance or having to re-paint, which are non-issues here. In fact, this seems like the perfect use case, in that it’s awkward to get at (so just being able to spray from a spray can would be a life-saver), but there’s very little water pressure (because it’s just drainage from a sink).
A $10 can of sealant vs a visit from a professional plumber seems like a big win, if it will get the job done.
Anyone have any guidance?