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07-20-2013, 10:39 PM
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Join Date: Jan 2011
Location: Ridgecrest, CA
Posts: 126
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RTV vs Tank Sealant for the wingtips
Finishing up the wing tips lights. Per the plans the underside is sealed with tank sealant. Mine has gone bad. Is RTV adequate?
Thanks,
__________________
Dan Wright
Building RV-12 #511 in the Mojave desert (1976W reserved)
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07-20-2013, 11:29 PM
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Join Date: Jul 2005
Location: Hubbard Oregon
Posts: 9,035
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Quote:
Originally Posted by DanWright
Finishing up the wing tips lights. Per the plans the underside is sealed with tank sealant. Mine has gone bad. Is RTV adequate?
Thanks,
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Paint will not stick to RTV (silicone).
__________________
Opinions, information and comments are my own unless stated otherwise. They do not necessarily represent the direction/opinions of my employer.
Scott McDaniels
Van's Aircraft Engineering Prototype Shop Manager
Hubbard, Oregon
RV-6A (aka "Junkyard Special ")
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07-21-2013, 07:38 AM
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Join Date: Jan 2013
Location: Peoria, AZ
Posts: 89
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Polyurethane window caulk is really tough when cured. more so than rtv and it is paintable!
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07-21-2013, 09:07 AM
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Join Date: Apr 2010
Location: Tucson, AZ
Posts: 461
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As others said, RTV is no good. I would use a DAP sealant today and not mess with the ProSeal on these lights. The stuff is flexible, paintable and you can easily wipe it off before it's cured.

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07-21-2013, 09:23 AM
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Join Date: Sep 2006
Location: Windsor, California
Posts: 924
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I believe that Van's sells small containers of ProSeal. One small container should be more than enough for the two wing tip light seals.
__________________
David Heal - Windsor, CA (near Santa Rosa)
EAA #23982 (circa 1965) - EAA Technical Counselor and Flight Advisor; CFI - A&I
RV-12 E-LSA #120496 (SV w/ AP and ADS-B 2020) - N124DH flying since March 2014 - 940+ hours (as of September 2020)! 
V AF donation through June 2021.
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07-21-2013, 11:24 AM
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Join Date: Mar 2005
Location: Dallas area
Posts: 10,768
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Quote:
Originally Posted by DanWright
Finishing up the wing tips lights. Per the plans the underside is sealed with tank sealant. Mine has gone bad. Is RTV adequate?
Thanks,
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As in "required for ELSA certification".
__________________
Mel Asberry, DAR since the last century.
EAA Flight Advisor/Tech Counselor, Friend of the RV-1
Recipient of Tony Bingelis Award and Wright Brothers Master Pilot Award
USAF Vet, High School E-LSA Project Mentor.
RV-6 Flying since 1993 (sold)
<rvmel(at)icloud.com>
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07-21-2013, 11:58 AM
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Join Date: Oct 2010
Location: Aguanga, Ca
Posts: 55
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Purpose for ProSeal here?
Is it for structural bonding or sealing out water or dampening the vibration of the 2 dis-simular materials ie FG and aluminum or?
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07-21-2013, 02:26 PM
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Join Date: Jul 2005
Location: Hubbard Oregon
Posts: 9,035
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Quote:
Originally Posted by RV12Roger
Is it for structural bonding or sealing out water or dampening the vibration of the 2 dis-simular materials ie FG and aluminum or?
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All of the above.
__________________
Opinions, information and comments are my own unless stated otherwise. They do not necessarily represent the direction/opinions of my employer.
Scott McDaniels
Van's Aircraft Engineering Prototype Shop Manager
Hubbard, Oregon
RV-6A (aka "Junkyard Special ")
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07-21-2013, 07:00 PM
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Join Date: Jan 2011
Location: Ridgecrest, CA
Posts: 126
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Quote:
Originally Posted by DHeal
I believe that Van's sells small containers of ProSeal. One small container should be more than enough for the two wing tip light seals.
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I was unaware of that. I ordered some. I had a hard time getting a new can for such a small job.
Thanks,
Dan
__________________
Dan Wright
Building RV-12 #511 in the Mojave desert (1976W reserved)
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07-21-2013, 08:00 PM
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Join Date: Oct 2010
Location: Phoenix, AZ
Posts: 2,820
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The wing tips have always posed a mystery to me. With such a beautiful and sophisticated design WHY did Vans leave us with that horrible meeting of wing skin and wingtip near the leading edge!
I ended up cutting off some skin and using Bondo to get a smooth edge. (After it was licensed ELSA)
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