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Sealing fuel tank fitting

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dalemed

Joined: 25 Dec 2007
Posts: 46

Posted: Mon Aug 03, 2009 6:16 am Post subject: Sealing fuel tank fitting

I'm adding a bulkhead AN fuel line fitting to my fuel tank and am wondering what to use to seal around it.  I've heard of Proseal, but I don't know what it is or where to get it.  I want something that won't be attacked by gasoline or alcohol.  



Any help will be appreciated!

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Dale
Zenith Zodiac CH650

rene(at)felker.com
Guest

Posted: Mon Aug 03, 2009 9:19 am Post subject: Sealing fuel tank fitting

You can get 1 oz Proseal (flameguard) from Van's.  But, I think proseal has

a problem with alcohol???? At least that is what I have read in the forums,

in relation to auto fuel. You may want to check the specs before you use it.

If you get the 1oz version you will not have to worry about measuring the

part A and B....it comes pre-weighted.....



Rene' Felker

RV-10 N423CF Flying

801-721-6080

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paulrod36(at)msn.com
Guest

Posted: Mon Aug 03, 2009 10:18 am Post subject: Sealing fuel tank fitting

<?xml:namespace prefix="v" /><?xml:namespace prefix="o" /><![endif]-->  Try Aircraft Spruce or Wicks. It's a two-part grey mess that smells awful,  but seals great. About $40 for about a quart. WEAR GLOVES!!!!!

  

 Paul R

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dalemed

Joined: 25 Dec 2007
Posts: 46

Posted: Mon Aug 03, 2009 12:00 pm Post subject: Re: Sealing fuel tank fitting

A 2 part mix sounds like an epoxy, which seems like overkill for an application like mine.  It seems like I should be able to use a non-hardening Permatex form-a-gasket type of stuff.  Am I wrong?



Thanks!

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Dale
Zenith Zodiac CH650

rene(at)felker.com
Guest

Posted: Mon Aug 03, 2009 12:21 pm Post subject: Sealing fuel tank fitting

Proseal is not an epoxy, but it is the real deal for tanks.  Sealed all the

rivet lines on my RV-10 tanks, and used it, as recommended by Vans, in other

places like the rudder trailing edge.  I am sure there are other sealants

that would be effective and easy to use for the fitting.  Just trying to

answer the proseal question.



Rene' Felker

RV-10 N423CF Flying

801-721-6080



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paulrod36(at)msn.com
Guest

Posted: Tue Aug 04, 2009 2:13 pm Post subject: Sealing fuel tank fitting

<?xml:namespace prefix="v" /><?xml:namespace prefix="o" /><![endif]-->  I wouldn't say you're wrong, but you might want to look at how much work it  is to remove a tank with a pinhole in it; particularly if you made your leading  edge skin in one piece. Even with a two-piece skin, what with the rivets AFT of  the spar, you either have to cut a bunch of access plates, open up about 5  rivets back on each rib, or get used to hearing rivet stubs rattling around in  there. Me, I'd rather err on the side of overkill than have to open the wing up  again. (Don't ask me how I know)

  

 Paul R

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z601a(at)anemicaardvark.c
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Posted: Tue Aug 04, 2009 2:59 pm Post subject: Sealing fuel tank fitting

On Tuesday 04 August 2009 17:11, paulrod36(at)msn.com wrote:

 	  Quote: 	
		   I wouldn't say you're wrong, but you might want to look at how much work it

 is to remove a tank with a pinhole in it; particularly if you made your

 leading edge skin in one piece. Even with a two-piece skin, what with the

 rivets AFT of the spar, you either have to cut a bunch of access plates,

 open up about 5 rivets back on each rib, or get used to hearing rivet stubs

 rattling around in there. Me, I'd rather err on the side of overkill than

 have to open the wing up again. (Don't ask me how I know)


	


You can improve your chances of success by pressurizing the tank with air 

after sealing but before installation. Paint the seams with a soap-bubble 

mixture to find leaks.



This doesn't work bad on Zenith's tanks after installing the fuel gauge 

floats.

-- 

=============================================

                Do not archive.

=============================================

                Jim B Belcher

    BS, MS Physics, Math, Computer Science

                  A&P/IA

     Retired aerospace technical manager

=============================================

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