Al W wrote:

 

After flying for six years, finally removed and disassembled my glass and

foam header tank. During those six years I periodically used ethanol fuel

and whatever. Always used auto fuel.  No evidence of degradation of any

component....soft aluminum, foam, epoxy. All looks perfect.

 

That’s good news.

 

Just a reminder, all epoxy that is fuel exposed must be high ratio type.

Like 4 to 1.   50/50 ratio epoxies can NOT handle “fuel” over time.

 

That’s bad news.  Should I conclude from this that EZ-poxy (44-56 by weight) will NOT handle fuel with ethanol?  I assume when you say “fuel” you mean fuel with ethanol, since experience has shown that EZ-poxy has handled auto fuel for periods of 15 years in some EZs.

 

Al G

 

HI AL,

That's a general rule of thumb as high ratio epoxies tend to be of a much higher quality than those of general purpose low quality epoxies often characterized by low ratios. That's not to say there may be exceptions to the rule, as I honestly don't know myself.

George (down under)