Reply
 
Thread Tools Search this Thread Display Modes
 
Old 11-07-2018, 12:50 PM   #1
New Member
 
Jazzy190's Avatar
 
1998 19' "B" Van Airstream 190
Oviedo , Florida
Join Date: Nov 2018
Posts: 3
Sealing the Joint Between Cap and Top of Van on B190

Hello, I am cross-posting this on the various Airstream/B190 forums, so I apologize for redundant posts and message length.

We have noticed a potential source for a small leak into the back right corner of our newly-acquired B190. (See photos for context.)

* Questions: (1) Does anyone have any recommendations on what sealer to use between the B190 cap and the top of the van, and how to do the sealing in this area? (2) Is it possible/advisable to apply a sealant around the perimeter of the joint, or is this not advised (should we just seal the isolated problem area?)

* Details: The culprit seems to be an area where the bottom of the top cap/hull meets the top of the van (as shown in photos). We think the water must be coming from the described joint area because the water "rolls down" the inside of the back door and also touches slightly into an area/corner of the wardrobe closest to the back door. The back door window seals look fine to us. There is no apparent water coming from the bathroom fan. I don't think the origin is the toilet vent because there is no water inside other parts of the wardrobe or in the bathroom, and there are no other signs of water anywhere else inside the B.

I have read info. on the forums about various sealants applied for different purposes, but I have not been able to locate a sealant for this particular purpose in any post (I am listing some below). Because the junction touches on fiberglass and metal, both, I want to make sure I prep the area properly and use the right sealer. I also do not want to "overseal" and cause water to accumulate under the sealant placed in this joint area (I remember reading a post stating this had happened to someone else who used putty and the putty caused water to pool in the area.)

* Potential Solutions: Some sealants I have read about include Sikaflex 221 White or 715.

* Sikaflex 221 White (for roof seams, seals and bonds. The post I read recommends using Eternabond spray cleaner to prepare surface.)
* Sikaflex 715 (used around fans, vents, skylights)

Any feedback offered on this subject is much appreciated!!
__________________

__________________
______
Jazzy
1998 Airstream B190
Jazzy190 is offline   Reply With Quote
Old 11-09-2018, 07:24 AM   #2
Rivet Master
 
InterBlog's Avatar

 
2006 22' Interstate
League City , Texas
Join Date: Oct 2014
Posts: 4,206
I don't know the details of your application (no photos), but FWIW, I've used Sikaflex 221 in numerous applications, and all of them were successful.

I put it on our Interstate's roof in lieu of the previously-applied self-leveling stuff that aged out of effectiveness (details here).

Not wanting to waste the residual contents of a caulk tube, I also used the same product on our house, to seal the exterior brick penetration where the air conditioning condenser lines ran up to the rest of the components in the attic. Those kinds of penetrations are notorious for being rodent superhighways. The Sikaflex performed wonderfully in that application, too.

It's tricky to apply and different people develop their own methods. I discuss that in the link above.
__________________

InterBlog is offline   Reply With Quote
Old 11-09-2018, 08:35 AM   #3
New Member
 
Jazzy190's Avatar
 
1998 19' "B" Van Airstream 190
Oviedo , Florida
Join Date: Nov 2018
Posts: 3
Sealing the Joint Between Cap and Top of Van on B190 Reply to Thread - Photos

Hi, Thanks for your reply. I am not sure why the images did not post. Probably size. My apologies. I am adding them here.

An update: I retested the door's weatherstrip, and it seems the culprit is the weatherstrip, after all. Nevertheless, I still need to fix the issue above. Some other folks suggested Lexel and 3M Marine Adhesive/Sealant 5200. It seems the Sikaflex 221 is more "gummy"?
Attached Thumbnails
Click image for larger version

Name:	JointIssue 2 JPEG.jpg
Views:	14
Size:	439.1 KB
ID:	327388   Click image for larger version

Name:	JointIssue1 JPEG.jpg
Views:	15
Size:	473.3 KB
ID:	327389  

Click image for larger version

Name:	SideViewLeakSource Joint3 JPEG.jpg
Views:	13
Size:	139.0 KB
ID:	327390  
__________________
______
Jazzy
1998 Airstream B190
Jazzy190 is offline   Reply With Quote
Old 11-09-2018, 08:47 AM   #4
Rivet Master
 
InterBlog's Avatar

 
2006 22' Interstate
League City , Texas
Join Date: Oct 2014
Posts: 4,206
Sikaflex 221 is very sticky, yes. That's a good thing - that's what makes it adhere to what otherwise might be tricky surfaces to work with.

If you've got an opportunity to add some kind of flashing in the area you describe, that might not hurt.
InterBlog is offline   Reply With Quote
Old 11-09-2018, 08:57 AM   #5
New Member
 
Jazzy190's Avatar
 
1998 19' "B" Van Airstream 190
Oviedo , Florida
Join Date: Nov 2018
Posts: 3
Sealing the Joint Between Cap and Top of Van on B190 Reply to Thread - 221 smoothing

Thanks so much for your advice. Do you think the 221 can be "smoothed" out or will, as your wife put it in the blog article you referenced, remain "ugly as sin"? If it can be smoothed out, what do you recommend? e.g., dip finger (or applicator) in mineral oil, water, etc. Thanks again!
__________________
______
Jazzy
1998 Airstream B190
Jazzy190 is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Sealing between the shell and the belly wrap Aktundra Leaks - Weatherstrips, Gaskets, Caulks & Sealants 4 09-03-2014 03:41 PM
LY Front Cap to Side Joint cruzaire Land Yacht/Legacy Motorhomes 3 05-27-2014 06:48 AM
NM Unit and 4CU Jemez Mountains Joint Rally LHall WBCCI Rallies & Events 0 01-05-2011 07:27 PM
Leak somewhere in top section- B190 Van Luckydog Sprinter and B-van Forum 5 04-09-2010 05:09 PM
David Crosby and Graham Nash Announce Their Candidacy for Joint Presidency Andy R Airstream "In the News" 11 08-02-2004 09:28 AM


Featured Campgrounds

Reviews provided by

Disclaimer:

This website is not affiliated with or endorsed by the Airstream, Inc. or any of its affiliates. Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 08:56 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.