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03-29-2013, 06:02 PM
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Join Date: Mar 2013
Location: STRONGSVILLE OHIO
Posts: 31
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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!
sn#120162
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03-29-2013, 06:17 PM
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Senior Curmudgeon
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Join Date: Sep 2005
Location: Dayton Airpark, NV A34
Posts: 15,420
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Welcome to VAF!
Quote:
Originally Posted by 08FATBOY
First time post.
sn#120162
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Rod, welcome aboard the good ship VAF 
__________________
Mike Starkey
VAF 909
Rv-10, N210LM.
Flying as of 12/4/2010
Phase 1 done, 2/4/2011 
Sold after 240+ wonderful hours of flight.
"Flying the airplane is more important than radioing your plight to a person on the ground incapable of understanding or doing anything about it."
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03-29-2013, 06:25 PM
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Join Date: Feb 2010
Location: Perth, Western Australia
Posts: 1,647
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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.
__________________
rgmwa
RV-12LR 912ULS
120346
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03-29-2013, 07:44 PM
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Join Date: Oct 2010
Location: Phoenix, AZ
Posts: 2,820
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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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03-29-2013, 11:20 PM
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Join Date: Jul 2005
Location: Hubbard Oregon
Posts: 9,035
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Quote:
Originally Posted by RFSchaller
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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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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03-30-2013, 07:40 AM
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Join Date: Mar 2013
Location: STRONGSVILLE OHIO
Posts: 31
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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!
SN#120162
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03-30-2013, 08:07 AM
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Join Date: Feb 2010
Location: Perth, Western Australia
Posts: 1,647
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Quote:
Originally Posted by 08FATBOY
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
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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.
__________________
rgmwa
RV-12LR 912ULS
120346
Last edited by rgmwa : 03-30-2013 at 02:51 PM.
Reason: added info
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03-30-2013, 08:17 AM
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Join Date: Aug 2008
Location: Texas, Fort Worth
Posts: 1,237
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Here's the simple answer!
Quote:
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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?
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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. 
__________________
John
RV12 N1212K
Flying Since June 2010
1020 Hours as of 9/30/2017
Johnrv12@icloud.com
RV14 Wing, arrived and building at Rdog's new Hanger at 16X
S/N 140014
Last edited by Jetguy : 03-30-2013 at 08:32 AM.
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03-30-2013, 11:22 AM
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Join Date: Nov 2008
Location: Gloversville, NY
Posts: 1,587
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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
__________________
John Peck, CFII, A&P, EAA Tech Counselor, Flight Advisor.
?Master Pilot? Award, UFO Member.
RV-12 N37JP 120176 Flying since 2012.
One Week Wonder Build Team, OSH 2018.
VAF paid through 10/2019.
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03-30-2013, 12:47 PM
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Join Date: Mar 2009
Location: Netherlands
Posts: 663
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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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