i've used it on tanks with success. i also bought some of that Mighty Putty shit that fucking hemeroid Billy "I color my beard" Mays sells on the infomercials. Fuck no I didn't "order it now" and get a extra tube for free. It was hanging near the register at Wal-Mart. I had meant to buy some JB Weld an realized I forgot to get it once I stood in line at our "Super" Wal-Mart for 30 minutes that convienently employs 3 cashiers at the registers on the 1st of the month. ANYWAY, off my Wal-Mart rant, I bought the Mighty Putty and it actually seems to work as good or better than the basic JB sticks. And they were 3 sticks for about 8 bucks I think.

OH....and an FYI for those who use it, you can get Sea-Foam at Wal-Mart for almost 3 bucks cheaper than it cost at the parts store (Auto Zone / Advanced Auto). I was a die hard B-12 Chemtool user for years. Sea-Foam rocks.