Completely resealed.
Allowed to cure for @ 3 weeks just in case that helps.
Filled 1/2 way last night.
Woke to a gentle suggestion this morning that I should get my butt out of the rack and clean the downstairs as the tank leaked overnight.
It is now dry and empty again. Tomorrow I will strip it and order more caulk.
The issue?
It's probably two fold. Firstly, I ignored wise counsel and used a battery powered caulking gun that I had never used before. No practice, no experience, no nothing... just dove in. That wasn't my best choice.
Second, I used an adhesive caulk for the first time. No practice, no experience, no nothing... just dove in. That stuff does not act like regular bathroom tub and tile caulk and when I went to remove the masking the caulk would stick to itself and whatever I had applied would assume a different shape as the tape pulled not just away from the material but the caulk stuck to the masking would pull more caulk away from the joint that had just been sealed.
The bead looked pretty rough but when I pulled the masking away it looked worse. A lot worse.
Apparently this has been a practice round.
I'm going to get this right and I'll air in more SCS1200 PDQ.
If you opt to try SCS1200 or any adhesive caulk on your tanks spend a tube's worth practicing first as it's not going to go like the old stuff did. I think next i'll try a stacked nickels welder's look and no masking. Could mean I get to try this a fourth time, eh?