Steve;

 

I don’t specifically recall any horror stories for EZpoxy with 10%, or less, ethanol; but perhaps I have selective memory.  I was pretty specific “EZpoxy tanks are OK with ethanol levels up to 10%.”

 

Factors that may contribute to the horror stories are a) different kinds of epoxies; b) more than 10% ethanol; c) lower cure temps for the epoxy, say, less than 70F; d) slightly off mix ratios; e) perhaps water in the ethanol/fuel mix which could be climate related – condensation in the tanks; e) other.

 

I recall from some discussion with an expert years ago that post-cure at 150F significantly increased resistance to all kinds of chemical reaction; and he believed – by extrapolation – that extended cure time above 90F could make a difference.  Also he believed that slightly off mix ratio would be a factor, as well as poor mixing of the resin/hardener.

 

I’m not beyond being concerned about my EZpoxy tanks; but they did see considerable time at 90F or above, and I, and others have had mogas in the tanks more than 4 years without deleterious effects.

 

Al G