The JB in the small toothpaste tubes ends up being pretty thin once mixed. Think mayonaise vs thick peanut butter. I point this out because it will run right off that pipe unless restrained somehow. I love JB but that is a weakness of that type. I have not tried the two semi solid type that you knead together. I wonder if you could use some type of gauze wrapped around it and the JB slathered on. JB, gauze, JB gauze, JB. If you can work that out I would consider it dang near a permanent repair-see I said I like JB. I would expect the JB to last nearly forever but the metal an inch or two away to develop a leak.