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06-05-2009, 03:58 PM
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#1
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2 Rivet Member
1974 31' Sovereign
Petersburg
, Virginia
Join Date: May 2009
Posts: 30
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Silicone ok for quick fix?
I had this at the end of another thread but I don't know how to move the post...sorry for posting the same question twice...
We've got leaks in most of the Vista View windows on our 1974 Sovereign. Planning to polish the exterior within the year and also replace the tint (removing windows as necessary). Would clear silicone caulk work ok for a quick fix? We just want to stop the leaking for now and do the windows properly when we get to them. Seems like clear silicone would plug the leaks but then be pretty easy to peel off when we're ready.
Thoughts?
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06-05-2009, 04:03 PM
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#2
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Rivet Master
1977 27' Overlander
1973 27' Overlander
1963 19' Globetrotter
Naples
, Florida
Join Date: Nov 2007
Posts: 1,259
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NO NO NO,silicone is about useless on alum.,use Vulcum.or something like that,I`m having a brain lockup. Dave
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06-05-2009, 04:19 PM
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#3
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Rivet Monster
1975 31' Sovereign
1980 31' Excella II
Sprung Leak
, North Carolina
Join Date: Jun 2003
Posts: 7,172
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Becky,
Problem with silicone is that it will leave a residue that is almost impossible to remove and will keep any other type of sealant from sticking to it. Are the leaks at the frame and shell or frame and glass? If they are at the frame and shell I have used aluminum tape (available at your local home improvement/hardware center in the HVAC area) to seal a small to medium sized leak. Not very pretty but does the job and can be easily removed. Vulkem 636 or Sikaflex 721-UV are the caulks of choice. Airstream used to use Vulkem but switched to Sikaflex a while back.
Aaron
__________________
....so many Airstreams....so little time...
WBCCI #XXXX AIR #2495
Why are we in this basket...and where are we going
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06-05-2009, 05:00 PM
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#4
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Rivet Master
2006 25' Safari FB SE
St. Cloud
, Minnesota
Join Date: Aug 2003
Posts: 13,280
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Silicone works too well and not well enough all at the same time. Too well - you can't get it off later. Not well enough - for unpredictable reasons certain areas of a silicone seal on aluminum never adhere and you still have the leak. Think I've heard it blamed on the tendency of any exposed aluminum to develop an oxide layer immediately. Blame our blue marble...
I had a friend who had a Cadillac boat (yes, that Cadillac) and he recaulked it about 3 times before he recycled it. I didn't know and couldn't tell him at the time that the leaks he kept experiencing were the result of his caulk and not the ill-fated boat.
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06-05-2009, 05:32 PM
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#5
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2 Rivet Member
1999 25' Safari
Fairburn
, Georgia
Join Date: Jul 2006
Posts: 74
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One of the problems with silicone (RTV) is that it contains acetic acid, which will corrode aluminum.
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06-05-2009, 06:30 PM
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#6
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Rivet Master
Vintage Kin Owner
1977 31' Excella 500
Berkeley Springs
, West Virginia
Join Date: Sep 2005
Posts: 1,638
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What about the GE stuff?
What about the stuff that GE makes that is supposedly formulated just to work with aluminum? They claim it's good for 50 years.
__________________
- Jim
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06-05-2009, 06:41 PM
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#7
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Rivet Monster
1975 31' Sovereign
1980 31' Excella II
Sprung Leak
, North Carolina
Join Date: Jun 2003
Posts: 7,172
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Quote:
Originally Posted by JimGolden
What about the stuff that GE makes that is supposedly formulated just to work with aluminum? They claim it's good for 50 years.
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I still won't use it. If it fails you have an unholy mess to clean off. FWIW Airstream at one time tried silicone and promptly went back to the Vulkem. IIRC it was around 1974.
Aaron
__________________
....so many Airstreams....so little time...
WBCCI #XXXX AIR #2495
Why are we in this basket...and where are we going
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06-05-2009, 07:05 PM
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#8
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Rivet Master
1968 28' Ambassador
Cedaredge
, Colorado
Join Date: Jul 2008
Posts: 2,542
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I've used the aluminum stuff for gutters and it works well, and is the right color...
__________________
Jason
May you have at least one sunny day, and a soft chair to sit in..
2008 5.7 L V8 Sequoia
AIR # 31243
WBCCI # 6987
FOUR CORNERS UNIT
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06-06-2009, 10:53 AM
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#9
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Rivet Master
Vintage Kin Owner
1977 31' Excella 500
Berkeley Springs
, West Virginia
Join Date: Sep 2005
Posts: 1,638
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I've only used silicone in one place, and I got that tip from the Avion forums (oddly enough I currently have an Avion trailer ); that place was under the giant rubber/foam gasket for the new a/c.
I'd replaced the gasket on the old a/c and it would still leak in a driving storm. One of the old timers on the Avion forums said that when he got his a/c replaced in the 80's, the dealer squirted some type of stuff around the bottom of the gasket where it touched down on the aluminum skin. He asked about it, and the guy told him it was factory procedure to do that. Said they never leaked that way. Otherwise, they'd tend to leak as the gasket got older.
Well, I had had the same thing happen to me when I changed the gasket and didn't add the goop. So when I just installed my new Carrier AirV, I shot some of that GE aluminum silicone around the bottom of the rubber gasket and tightened her down. We've had some strong sideways rain strorms of late and not a drop came in. But I guess time will tell.
On the roof seams, I used aluminum Kool Seal. That's what the SilverAvion guru's recommend (Dr. Gradeless is the Inland Andy of Avions and Dr. G says to use nothing but aluminum Kool Seal on the roof seams...) and she's been dry as a bone.
But under the a/c gasket is the only place I've ever used silicone.
Best of luck,
__________________
- Jim
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06-06-2009, 02:00 PM
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#10
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3 Rivet Member
1974 27' Overlander
Puyallup
, Washington
Join Date: Apr 2003
Posts: 124
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I used silicon on my AS many, many years ago... It worked just fine (applied over clearcoat) and lasted for many years. Recently, in a effort to chase down leaks, I removed much of the silicon and re-applied Vulkem in its place. It is difficult to remove, but what you can't get off by peeling, you can get off with paint thinner
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06-06-2009, 03:11 PM
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#11
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4 Rivet Member
1971 23' Safari
Groveport
, Ohio
Join Date: Mar 2006
Posts: 279
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I have used clear latex caulk for a temp. fix. over a window frame and removed this spring with no problem and replaced with vulcem. Robert
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06-06-2009, 03:46 PM
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#12
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Rivet Master
2014 25' Flying Cloud
Cuddebackville
, New York
Join Date: May 2007
Posts: 4,346
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I carry some butyl tape in case I spring a leak. Certainly it's temporary, but it works and comes off easily.
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06-24-2009, 07:20 AM
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#13
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New Member
1977 31' Sovereign
New York
, New York
Join Date: Jun 2009
Posts: 3
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where does one get vulkem of sikaflex?
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06-24-2009, 07:43 AM
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#14
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Rivet Master
1973 31' Sovereign
Danielsville
, Georgia
Join Date: Feb 2004
Posts: 904
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Parbond is really nice for small seams and around window frames.
Parbond and vulkem can both be purchased from InlandRV (CA) or Vintage Trailer Supply (somewhere on East coast)
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06-24-2009, 09:19 AM
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#15
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Rivet Master
1973 27' Overlander
Tucson
, AZ
Join Date: Aug 2008
Posts: 1,480
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Don't do it !!!
I've been scraping silicone off my Silver Olive for a couple months (little at a time - especially in the heat). It has definitely damaged the aluminum: fairly heavy corrosion/deterioration under the bead/length of silicon where applied. Now I have permanent grooves along many of the seams, above windows, above the awning and around the vents. Nice.
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06-28-2009, 07:37 PM
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#16
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2 Rivet Member
1974 31' Sovereign
Petersburg
, Virginia
Join Date: May 2009
Posts: 30
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yikes. ok, I definitely get the picture!
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09-20-2009, 09:40 PM
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#17
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4 Rivet Member
1975 25' Tradewind
, Michigan
Join Date: Sep 2002
Posts: 450
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Dreaded Silicon Caulk - Boo Hoo
OK....now what and HOW??? Last fall, during winterizing, a camper center "caulked" around a vista view per our request. They used clear silicon and pretty much smeared it along the top of the window frame where it sets into the shell.
When re-caulking, I believe you should remove the old, dried/cracked caulk (even though a tour guide at JC said they would just caulk over it there!) If so, what tool (dental pick?) would you carefully use. The exsisting caulk is white in color with a sort of grainy, rather than smooth finish, is to all windows, door, rub rail, in a perfectly applied 1/4 " line.
Thanks a bunch, Sue
(oh, and volunteers are welcome for this project!!)
__________________
sue and ike
'75 Tradewind - 25'
"Cupcake" air-912
2004 GMC Yukon XL 2500
Michigan - "middle of the mitt"
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09-20-2009, 10:27 PM
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#18
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Rivet Master
1976 Argosy 24
Joplin
, Missouri
Join Date: Mar 2008
Posts: 2,673
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Quote:
Originally Posted by Evanelk
where does one get vulkem of sikaflex?
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I buy Sikaflex from local RV dealers. Most don't carry Vulkem.
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09-21-2009, 06:28 AM
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#19
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Rivet Master
1964 17' Bambi II
Vintage Kin Owner
Schererville
, Indiana
Join Date: Jul 2005
Posts: 2,637
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Quote:
Originally Posted by eikel1we
OK....now what and HOW??? Last fall, during winterizing, a camper center "caulked" around a vista view per our request. They used clear silicon and pretty much smeared it along the top of the window frame where it sets into the shell.
When re-caulking, I believe you should remove the old, dried/cracked caulk (even though a tour guide at JC said they would just caulk over it there!) If so, what tool (dental pick?) would you carefully use. The exsisting caulk is white in color with a sort of grainy, rather than smooth finish, is to all windows, door, rub rail, in a perfectly applied 1/4 " line.
Thanks a bunch, Sue
(oh, and volunteers are welcome for this project!!)
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Harbor Freight has a nice little dental tool kit that comes in handy for removing the old caulk. Sounds like you have Vulkem/Tempro around your windows & doors. If you aren't experiencing any leaks, you don't really have to redo it, but the tools come in handy if you have to remove it. The silicone is a pistol to remove. My trailer was covered in it when purchased. I didn't have many fingernails left & used the dental tools to death. It's just a time consuming tedious job. No special tricks, just time!
__________________
Becky
1964 Bambi II
1988 Avion 32S
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09-21-2009, 04:27 PM
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#20
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4 Rivet Member
1975 25' Tradewind
, Michigan
Join Date: Sep 2002
Posts: 450
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Quote:
Originally Posted by beckybillrae
"..... If you aren't experiencing any leaks, you don't really have to redo it, but the tools come in handy if you have to remove it. The silicone is a pistol to remove. My trailer was covered in it when purchased. I didn't have many fingernails left & used the dental tools to death. It's just a time consuming tedious job. No special tricks, just time!
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Thanks Becky. The rain water is coming out from the two side windows that are across from one another and dripping on the "ledge" - Vista View windows above. Of course, there's no easy way to determine where the water is getting in.
Does anyone know if there's a "safe for Airstream" solvent to remove the silicon? Grrrrrrrrrrrr!!
Sue
__________________
sue and ike
'75 Tradewind - 25'
"Cupcake" air-912
2004 GMC Yukon XL 2500
Michigan - "middle of the mitt"
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