Have found a tank sealer that is leaps ahead of Kreem...it is: Gas Tank Sealer, manf. by CASWELL Inc.
4336 Route 31, Palmyra NY 14522-9719
315-5975140...//www.caswellplating.com about $22 enough to do three tanks
Bye, Tom Brosius
POR paints make a good one too. I just did an old rusty tank with it and it's fantastic.
Chris
In regards to conditioning a fiberglass tank what are the options or would it be possible to get a metal tank as a replacement for a 1974 Penton 250. Would Clark plastic tanks make a tank for this bike?
The short answer is that Clarke do not make tanks for the '74-'75 era Pentons. All of their stuff is for the MC5 and newer bikes. I do have a Clarke MC5 MX tank that I was able to make fit on my '74 AHRMA motocrosser though. I had to heat the bottom for better clearance and although its not a great fit, it's not terrible either. For the money, you can probably find a stock tank with some searching.