Fibreglass fuel tank

Hi.
Are there any of you using a fibreglass tank. What is the best sealer to protect to use to protect from the effects of ethanol?
I’ve just managed o pick a tank up cheep and clean, I will do a leak test on it when I get a chance! Certainly before filling it anyhow.
Cheers Shane.
Are there any of you using a fibreglass tank. What is the best sealer to protect to use to protect from the effects of ethanol?
I’ve just managed o pick a tank up cheep and clean, I will do a leak test on it when I get a chance! Certainly before filling it anyhow.
Cheers Shane.