Originally Posted by
Leroy Gardner
Yes Sig has Butyrate dope in pints and guarts however it's not the good choice because it shrinks forever. I use Nitrate when it's called for and Laquer primer and paint with automotive paints so I don't worry about fuel proof.
I don't think that Sig Butyrate shrinks forever, it shrinks until it dries which can be a month or so but once it's dry then it can't shrink anymore. I had a 1/6 scale Sig clipped wing cub I finished with Sig Koverall and Butyrate dope, had it for over 20 years with no problems. Butyrate dope is fuel proof to 10% nitro I believe.