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Old 07-24-2004, 11:07 AM   #1
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Sikaflex, Vulkem, and Parbond Questions

Can anyone explain where each of these sealants are suppose to be used?
How they should be used?
How they should be removed?
Does AS use these today or just Sikaflex?
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Old 07-24-2004, 12:40 PM   #2
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http://www.airforums.com/forum...light=sikaflex

Its a Sticky in the Exterior Restoration Forum as the question gets asked repeatedly.
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Old 07-24-2004, 06:39 PM   #3
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late breaking news

I found out last week from an Airstream dealer that the factory has now switched to Sikaflex exclusively. While I have not independently verified this claim, I thought I would pass it on. It would be nice to know if this is true.

Hopefully Inland Andy will catch this post & comment.

Tom
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Old 07-25-2004, 08:36 AM   #4
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Quote:
Originally Posted by BobbyW
http://www.airforums.com/forum...light=sikaflex

Its a Sticky in the Exterior Restoration Forum as the question gets asked repeatedly.
This doesn't seem to answer the question about Sikaflex I asked unless I am to just assume that it is for use on large seams. I have read this threed before and it does have some great info. I guess Parbond is only for very small seams 1/8" and smaller. I have also heard that Vulkem is now used under the trailer and in the wheel wells. Still like to know where to use each sealant for sure.

Quote:
Originally Posted by tcwilliams
I found out last week from an Airstream dealer that the factory has now switched to Sikaflex exclusively. While I have not independently verified this claim, I thought I would pass it on. It would be nice to know if this is true.

Hopefully Inland Andy will catch this post & comment.

Tom
Tom, I am wondering about the Sikaflex too. Check out the quote from the thread BobbyW, suggested post #16 I placed it below. It says the factory is using GE Alumin Silicone now and after all that has been said about silicon I find this hard to believe. So I am confused.

Quote:
Originally Posted by mareinmn
ellablu

Please Say You haven't used that dredded V stuff yet.
Even the factory is using the GE Alumin. Silicon caulk that you can get from Home Depot Etc.
Much easier (small caulking gun), color matches, and stays pliable forever.
mareinmn
A few post down on the thread BobbyW gave this quote is challanged.

Silicone and smooth surfaces don't seem to get along as the silicone will peel right off and also as I understand it Silicone will leave open gaps here and there when applied to a smooth surface thus it will appear as if it is sealing but it is not and a leak can occur.

Parbond is for small seams 1/8" or smaller as I understand it.

Now Vulkem or Sikaflex? I know that Inland RV sells Sikaflex now so has AS changed to this and does this mean that Vulkem is no longer used?

I hope Andy pipes in to this thread too as I would like to know his opinion.
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Old 07-25-2004, 10:55 AM   #5
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Also can you paint over Vulkem? I think I read somewhere that you can paint over Sikaflex...............
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Old 07-25-2004, 12:14 PM   #6
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My testimonial is my own '65 Globetrotter were some PO put silicon sealant all around the windows. It turned the most awful gray and has dirt imbedded in it. It has pulled away in many places and will have to be labouriously dug out and redone as it still leaks. I am using gray Parbond in a syringe with the blue painters tape to repair it.
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Old 07-25-2004, 12:20 PM   #7
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Vulkem vs. Sikaflex

Airstream production "HAS" changed from Vulkem sealer to "SIKAFLEX."

Action: I don't have the engineering reasons why Airstream changed.

Both are absolutely paintable. Sikaflex can be used anyplace that Vulkem was used.

There are two advantages to the Sikaflex.

The first is that it has a smooth texture.

Secondly, it's cheaper. (Our part# 51560)

Andy
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Old 07-25-2004, 12:26 PM   #8
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BobbyW

It is not necessary to use a syringe with Parband.

The oriface provided by that tube gives a bead of about 1/8 inch.

However, if you desire a bead smaller than that, you can easily crimp the end of the Parbond tube to most any dimension smaller than 1/8 inch.

Additionally, you don't have to buy the syringe, secondly, you don't have a messy syringe to clean up.

Andy
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Old 07-25-2004, 12:38 PM   #9
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Agreed on the syringes not being necessary. I use them for accuracy and I just happen to have access to them due to my wife and her father always giving shots to cows. They have boxes of them in all sizes. Ranchers & farmers have all kinds of neat things to borrow.
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Old 07-25-2004, 12:53 PM   #10
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Guess what folks, I was just washing and Walbernizing my '04 CCD (new from the factory to me) and there are spots where, clearly, A/S used silicone! Most notably on holes in the frame above the curbside windows (on the flange above the window), on a few spots around or near the front window top where the plexi stone guards attach, above the door, and on spots around the awnings. Nobody else has touched this trailer. Hmmmm. Wonder what's up with that?
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Old 07-25-2004, 04:10 PM   #11
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Quote:
Originally Posted by Xray
Guess what folks, I was just washing and Walbernizing my '04 CCD (new from the factory to me) and there are spots where, clearly, A/S used silicone! Most notably on holes in the frame above the curbside windows (on the flange above the window), on a few spots around or near the front window top where the plexi stone guards attach, above the door, and on spots around the awnings. Nobody else has touched this trailer. Hmmmm. Wonder what's up with that?
It has been noted before on these forums that there are silicone products developed for use on aluminum. One can only assume that such is the case here.

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Old 07-25-2004, 10:33 PM   #12
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Thanks Andy for clearing up the "Has AS switched to Sikaflex?" question.

As for AS using silicone now I would have to say that with the improvements in our technology it is only reasonable that the sealant industry would have found a way to implement silicone into a useful state for hgihway trailers, and also for RV trailers.
However, I am sure that it is probably a special type of silicone since there are about 30 different type silicone sealants on the market.
As for me I think I will try to stay with the Sikaflex and Parbond, and just forget good old Vilkem.
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Old 07-27-2004, 11:36 AM   #13
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Has anyone ordered Sikaflex from Austin Hardware? Are they reliable? http://www.austinhardware.com/produc...478&pf_id=3243
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Old 07-27-2004, 11:50 AM   #14
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Quote:
Originally Posted by markdoane
Has anyone ordered Sikaflex from Austin Hardware? Are they reliable? http://www.austinhardware.com/produc...478&pf_id=3243
I ordered from them Friday last week. I certainly hope they are reliable. I know they have Sikaflex for $5.47 a tube
I'll post when I receive my order.
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