I own a 1992 KitfovIV ser#1632. I finished building and started flying it in 1993. I am wondering if anyone would know if these tanks are sealed with a kreem. I have had 0 problems with them leaking but Im starting to get concerned about the ethanol issue. Currently the wings are in my garage because I have just finished recovering them and they are ready to be painted. I do not want to go any further until I decide what to do with the fuel tanks. Any thoughts and advice would be appreciated.