sealer for gasoline tanks

[67hat34c]

I was searching the net and found this, what do you think.
with the larger fuel tanks, i would guess the top could be cut open and the inside coated with this stuff

http://www.ftrs.com.au/fueltanks/red_kote.php

 

[67hat34c]

scratch the last site, found another that sounds better

http://www.kbs-coatings.com/index.aspx