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  #1  
Old 03-29-2013, 06:02 PM
08FATBOY 08FATBOY is offline
 
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Location: STRONGSVILLE OHIO
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Default RV-12 Firewall rivet sealant

First time post. I have a question about what type of sealant to use , fuel tank sealant or firewall sealant and is it required to cover all pulled rivets? Also, if covered, is their any thought about viberation causing rivets to loosen that might be masked by sealant, or just overthinking. Anxious to start on engine. Thanks for all input!




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Old 03-29-2013, 06:17 PM
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Mike S Mike S is offline
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Default Welcome to VAF!

Quote:
Originally Posted by 08FATBOY View Post
First time post.


sn#120162
Rod, welcome aboard the good ship VAF
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Old 03-29-2013, 06:25 PM
rgmwa rgmwa is offline
 
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I used 3M Fire Barrier 2000+ on the firewall and to seal the pulled rivets. You need a fire retardant sealant here, not Pro-Seal. There is no reason to think that vibration would loosen a properly set rivet.
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Old 03-29-2013, 07:44 PM
RFSchaller RFSchaller is offline
 
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I used Hi temp RTV. You don't need to goop every rivet because the mandrel a plug them. Just plug everywhere you see daylight.
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Old 03-29-2013, 11:20 PM
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rvbuilder2002 rvbuilder2002 is offline
 
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Quote:
Originally Posted by RFSchaller View Post
I used Hi temp RTV. You don't need to goop every rivet because the mandrel a plug them. Just plug everywhere you see daylight.
This is not correct if you are building E-LSA.
The KAI stipulates that you are to seal each rivet (along with the panel seams and other gaps).
A major reason is, regardless what you think, the blind rivets are not sealed.
Oil, etc., can and will pass through them.
High temp RTV is not a good choice of sealant because it is not fuel resistant.
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Old 03-30-2013, 07:40 AM
08FATBOY 08FATBOY is offline
 
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I am building to E-LSA, and will cover all rivet heads. Plans show both fuel tank and firewall sealant which to use? Would appreciate any photos of firewalls as i am trying to make this as neet as possible. Thanks again!



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Old 03-30-2013, 08:07 AM
rgmwa rgmwa is offline
 
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Quote:
Originally Posted by 08FATBOY View Post
I am building to E-LSA, and will cover all rivet heads. Plans show both fuel tank and firewall sealant which to use? Would appreciate any photos of firewalls as i am trying to make this as neet as possible. Thanks again!
SN#120162
Some fuel tank sealant is used in the joint between the vertical and horizontal sections of the firewall, as called out in the plans. Fire sealant is used generally where the fuselage skins met the firewall, and to seal the rivets and any other gaps. The plans tell you where to use it. This picture is from Tony Tessitore's build site. I'm sure he won't mind me posting a link here. If you want to see masterful workmanship, have a look through his collection of photos.

http://tonytessitore.smugmug.com/RV-...8dhkj&lb=1&s=A

I used masking tape to make neat little squares around each of the rivets before applying the sealant, but it still looks pretty ugly.
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Last edited by rgmwa : 03-30-2013 at 02:51 PM. Reason: added info
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Old 03-30-2013, 08:17 AM
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Jetguy Jetguy is offline
 
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Cool Here's the simple answer!

Quote:
I have a question about what type of sealant to use , fuel tank sealant or firewall sealant and is it required to cover all pulled rivets?
Sorry Rod. Sometimes when you ask a simple question you don't always get a simple answer here on the form. The answer is use Pro Seal, otherwise known as FlameMaster. The same stuff you use to build your fuel tank. Here is the link for purchase.
http://www.vansaircraft.com/cgi-bin/...roduct=proseal

Yes cover all Rivets or gaps that might let any fluids or exhaust gases into the cockpit. Neatness doesn't count.
There is a bit of a learning curve when it comes to ProSeal. If you want after you apply it you can try patting it down some with your finger. Put good old fashion spit on your finger before you touch the proseal to keep your finger from sticking to it.
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Last edited by Jetguy : 03-30-2013 at 08:32 AM.
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Old 03-30-2013, 11:22 AM
BigJohn BigJohn is offline
 
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Rod, welcome to the forum. When I put the goop (proseal) on the rivet heads I was concerned about slopping over. So I cut up a bunch of sticky labels into smaller pieces and punched them with a hole punch. Then centered the holes over the rivets. Put on the proseal, waited for it to partially cure, then pulled off the labels. Yeah, I know, neatness doesn't count, but sometimes my OCD just gets the best of me.

John
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  #10  
Old 03-30-2013, 12:47 PM
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Gagarin737 Gagarin737 is offline
 
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I did it like John and even then it will be a mess ;-)
But proseal smell great!

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