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Old 05-08-2011, 06:19 PM   #1
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What type of caulking material to use?

The photo shows a caulking compound above the windows and entry door on our 1977 Airstream 31 foot International Sovereign. Want to replace the caulking and don't know what type of caulking material to use. Can someone point me in the right direction?
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Old 05-08-2011, 06:50 PM   #2
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The photo shows a caulking compound above the windows and entry door on our 1977 Airstream 31 foot International Sovereign. Want to replace the caulking and don't know what type of caulking material to use. Can someone point me in the right direction?
What you see is the original Vulkem sealer, which is still used. A creamy version of Vulkem is sikoflex.

Small seams are sealed with Par-bond.

Andy
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Old 05-08-2011, 08:11 PM   #3
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What you see is the original Vulkem sealer, which is still used. A creamy version of Vulkem is sikoflex.

Small seams are sealed with Par-bond.

Andy
That Vulkem sealer has a lifetime; I've got a leak in my blackwater vent housing that I can't even see, but that's where the leak is.
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Old 05-08-2011, 08:22 PM   #4
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That Vulkem sealer has a lifetime; I've got a leak in my blackwater vent housing that I can't even see, but that's where the leak is.
Mike.

Easy answer.

Take a sewer vent pipe cover off, and you should find a bad gasket. That gasket only lasts 2 to 3 years, or so.

Andy
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Old 05-08-2011, 09:16 PM   #5
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Mike.

Easy answer.

Take a sewer vent pipe cover off, and you should find a bad gasket. That gasket only lasts 2 to 3 years, or so.

Andy
Hey Mike I hear that desert air dries those gaskets out faster.

Cheers, Dan
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Old 05-08-2011, 09:18 PM   #6
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Mike.

Easy answer.

Take a sewer vent pipe cover off, and you should find a bad gasket. That gasket only lasts 2 to 3 years, or so.

Andy
First thing I thought about, Andy. However, the PO (or AS) had sealed the outside with what I thought was Vulkem, maybe not. However, I sealed the cap (I thought maybe the boot around the abs vent was leaking) and ran water and the leak was on the outside between the roof and cover. I further went to find the leak by putting towels on the upper part of the vent cover, and, during a NW heavy rain, no leak. I'm going to try to re- seal it with my favorite Par-bond after drying the area off. Otherwise, I'll pull the vent housing and start over.
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Old 05-08-2011, 09:37 PM   #7
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Hey Mike I hear that desert air dries those gaskets out faster.

Cheers, Dan
You're right, first thing I thought about was those seven months in the desert. I'd hoped everything would swell-up when we got back to the "green & grey". I'll tell you one thing: there is no mold or moisture in the rear "hidden" compartments under the beds as was usual when we stayed up north for the winter. The other plus (so far) is the desert air brought spiders into the coach that seemed to get rid of the ant population that have tormented us when we're north.
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Old 05-09-2011, 09:39 AM   #8
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Mike.

Take the cover off, and find the surprise.

The cover doesn't leak, the gasket inside of it is the culprit.

Andy
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Old 05-09-2011, 09:51 AM   #9
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Mike.

Take the cover off, and find the surprise.

The cover doesn't leak, the gasket inside of it is the culprit.

Andy
Before I pull them, do you have two in stock?
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Old 05-09-2011, 12:04 PM   #10
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Before I pull them, do you have two in stock?
Nope. But we do have 53 of them.

Andy
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Old 05-09-2011, 12:55 PM   #11
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Nope. But we do have 53 of them.

Andy
Should I re-seal them with Vulkem or would Par Bond work as well or should I bother with new gaskets? Will order some up today, thanks, Andy.
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Old 05-09-2011, 12:58 PM   #12
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Should I re-seal them with Vulkem or would Par Bond work as well or should I bother with new gaskets? Will order some up today, thanks, Andy.
Seal them with Vulkem.

Andy
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Old 05-15-2011, 11:04 AM   #13
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Sealers

ANDY, I appreciate your many posts to the different threads. It always helps, to not only have help and advise from other AS owners, but also from someone in the "business".

I have several areas to "seal", i.e. seams, Ateood water heater install, lights, etc. Can you tell me the difference between butyl tapes, putty tape, vulkem.
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Old 05-15-2011, 11:29 AM   #14
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ANDY, I appreciate your many posts to the different threads. It always helps, to not only have help and advise from other AS owners, but also from someone in the "business".

I have several areas to "seal", i.e. seams, Ateood water heater install, lights, etc. Can you tell me the difference between butyl tapes, putty tape, vulkem.
Butyl tapes and putty tape, should never, EVER, be used on an Airstream, as they have a very limited life.

Big seams use Vulkem or Sikoflex.

Small seams use Parbond.

All of those last at least 40 or more years.

The key to a good sealing job, is to make sure that the area to be caulked is free from any chemical, and is absolutely clean.

Andy
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