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Date: Fri, 29 Dec 2006 10:03:11 -0600
From: Charlie England <ceengland@bellsouth.net>
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: Yet another limp home story
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James Maher wrote:

> Wendell,
> During the construction of my turtleback and fuel tank I used a 
> combination of West Systems for some parts and Aeropoxy for others.
> If it is any consolation the West Systems seems to be holding up 
> better than the Aeropoxy so far.
> This fuel tank has had auto fuel in it for over 5 years.
> It is just recently, since the use of ethanol that I have noticed the 
> changes in its integrity.
> Be sure that any sealer that you use is rated for auto fuel with alcohol.
> The Pro-seal that all the RV guys are using on their aluminum tanks 
> will not even hold up to auto fuel with ethanol.
> Personally I don't like the idea of a sealer because if/when it starts 
> to deteriorate and gets ingested into the system it will cause the 
> same problem that I am having right now but maybe even worse.
>  
> Jim


Please be careful about making blanket statements. Pro-seal is a brand 
name. There are many different versions of sealants, even within the 
same brand. The sealant I got with my RV kit was a different brand & is 
alcohol safe. I'm sure that Pro-seal makes an alcohol safe version, also.

I'm bringing this up because misinformation can cause major 
inconvenience, & in some cases danger to life & limb. On a couple of 
other lists I follow, guys are talking about using 'proseal' as an 
adhesive because it sticks well & others have used it as an  adhesive. 
Problem is, those same companies also make real adhesives that look & 
are handled in the same manner as their sealants. The data sheets for 
the sealants specifically warn against using them as adhesives. See the 
danger?

Charlie