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Home » Public Forums » GMCnet » Suggested sealant for belt line (Belt line sealer?)
Suggested sealant for belt line [message #344963] Sat, 06 July 2019 10:38 Go to next message
dservati1 is currently offline  dservati1   
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Hi All, I'm looking for suggestions on what you've used successfully as a sealer at the belt line between the aluminum and the Beltline?
I've searched the Forum and have not come up with any good results so looking for current suggestions from those that have done it before. Thanks


'78 Palm Beach. car nut new to RV'ing 26 ft. 403 rebuilt in 2018, rebuilt tranny in 2014, Dave Lenzi knuckles & hubs, yada yada yada on ION wheels,Green Brady Bunch stock David Martin on Facebook
Re: [GMCnet] Suggested sealant for belt line [message #344971 is a reply to message #344963] Sat, 06 July 2019 12:45 Go to previous messageGo to next message
sgltrac is currently offline  sgltrac   United States
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Are you planning on painting afterward?

Sully
Bellevue wa

On Sat, Jul 6, 2019 at 9:47 AM David via Gmclist
wrote:

> Hi All, I'm looking for suggestions on what you've used successfully as a
> sealer at the belt line between the aluminum and the Beltline?
> I've searched the Forum and have not come up with any good results so
> looking for current suggestions from those that have done it before. Thanks
> --
> '78 Palm Beach. car nut new to RV'ing 26 ft. 403 rebuilt in 2018, rebuilt
> tranny in 2014, Dave Lenzi knuckles & hubs, yada yada yada OEM chromed
> wheels,Green Brady Bunch stock
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
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Sully 77 Royale basket case. Future motorhome land speed record holder(bucket list) Seattle, Wa.
Re: [GMCnet] Suggested sealant for belt line [message #344976 is a reply to message #344963] Sat, 06 July 2019 13:18 Go to previous messageGo to next message
Gary Worobec is currently offline  Gary Worobec   United States
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You might think about sealing the cavity and putting on the trim dry. Any water that might get in there would run out instead of maybe being trapped. Some folks suggested this when we did our paint. Also the trim piece between the roof and the sides. Just seal the cavity and put the trim on dry. Any water coming off the roof just runs right out the bottom instead of collecting and finding it’s way into the coach.

Gary

> On Jul 6, 2019, at 8:38 AM, David via Gmclist wrote:
>
> Hi All, I'm looking for suggestions on what you've used successfully as a sealer at the belt line between the aluminum and the Beltline?
> I've searched the Forum and have not come up with any good results so looking for current suggestions from those that have done it before. Thanks
> --
> '78 Palm Beach. car nut new to RV'ing 26 ft. 403 rebuilt in 2018, rebuilt tranny in 2014, Dave Lenzi knuckles & hubs, yada yada yada OEM chromed
> wheels,Green Brady Bunch stock
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org


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Re: [GMCnet] Suggested sealant for belt line [message #344979 is a reply to message #344976] Sat, 06 July 2019 14:09 Go to previous messageGo to next message
sgltrac is currently offline  sgltrac   United States
Messages: 2797
Registered: April 2011
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Senior Member
What cavity are you referring to Gary? The belt extrusions on the 77-78 are
integrated and cannot be removed. The early models I believe have an
aluminum strip over a cavity.

Sully
Bellevue wa

On Sat, Jul 6, 2019 at 11:19 AM Gary Worobec via Gmclist <
gmclist@list.gmcnet.org> wrote:

> You might think about sealing the cavity and putting on the trim dry. Any
> water that might get in there would run out instead of maybe being trapped.
> Some folks suggested this when we did our paint. Also the trim piece
> between the roof and the sides. Just seal the cavity and put the trim on
> dry. Any water coming off the roof just runs right out the bottom instead
> of collecting and finding it’s way into the coach.
>
> Gary
>
>> On Jul 6, 2019, at 8:38 AM, David via Gmclist
> wrote:
>>
>> Hi All, I'm looking for suggestions on what you've used successfully as
> a sealer at the belt line between the aluminum and the Beltline?
>> I've searched the Forum and have not come up with any good results so
> looking for current suggestions from those that have done it before. Thanks
>> --
>> '78 Palm Beach. car nut new to RV'ing 26 ft. 403 rebuilt in 2018,
> rebuilt tranny in 2014, Dave Lenzi knuckles & hubs, yada yada yada OEM
> chromed
>> wheels,Green Brady Bunch stock
>>
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
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Sully 77 Royale basket case. Future motorhome land speed record holder(bucket list) Seattle, Wa.
Re: [GMCnet] Suggested sealant for belt line [message #344992 is a reply to message #344971] Sat, 06 July 2019 18:43 Go to previous messageGo to next message
dservati1 is currently offline  dservati1   
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Yes I plan on painting over it, hopefully this year.

'78 Palm Beach. car nut new to RV'ing 26 ft. 403 rebuilt in 2018, rebuilt tranny in 2014, Dave Lenzi knuckles & hubs, yada yada yada on ION wheels,Green Brady Bunch stock David Martin on Facebook
Re: [GMCnet] Suggested sealant for belt line [message #345002 is a reply to message #344992] Sun, 07 July 2019 01:08 Go to previous messageGo to next message
sgltrac is currently offline  sgltrac   United States
Messages: 2797
Registered: April 2011
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If you are planning on painting over it you have a myriad of good choices.
Since you are attempting to seal between aluminum which has a lot of
thermal movement and SMC which does not you want a polyurethane sealant
which is has a lot of stretch so it can allow movement without cracking
and also accept paint coatings. 3m makes an excellent, cost effective
single part moisture cure sealant which can be applied over bare
aluminum as well as properly prepared painted surfaces which has great
toolability as well as adhesion strength. 3m 08369 is available in soft and
conventional (caulking gun cannister) at any autobody supply store. slight
variations in part number will give you color options of at least gray or
white(there may be more options now). as far as single component sealants
go ive not seen a better 1k product come out yet. we still use it
frequently in suitable applications. As I said at the beginning there are a
myriad of sealant options. I think for this application 3m 08369 is a great
choice. go to the 3m website and peruse their tech pages until your eyes
get blurry and you will probably end up back at 08369.

sully
Bellevue wa

On Sat, Jul 6, 2019 at 4:44 PM David via Gmclist
wrote:

> Yes I plan on painting over it, hopefully this year.
> --
> '78 Palm Beach. car nut new to RV'ing 26 ft. 403 rebuilt in 2018, rebuilt
> tranny in 2014, Dave Lenzi knuckles & hubs, yada yada yada OEM chromed
> wheels,Green Brady Bunch stock
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
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Sully 77 Royale basket case. Future motorhome land speed record holder(bucket list) Seattle, Wa.
Re: [GMCnet] Suggested sealant for belt line [message #345004 is a reply to message #345002] Sun, 07 July 2019 03:55 Go to previous messageGo to next message
6cuda6 is currently offline  6cuda6   Canada
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Registered: June 2019
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Senior Member
Another good product, although maybe a little tougher to find is SikaFlex ...its another bonding agent that is toolable when wet(like caulking) and glues pretty much anything to anything. Once it cures it allows for some elasticity but yet stays strong.

Warning though, it needs to cure once applied before paint or it will crack the paint as it dries.


Rich Mondor, Brockville, ON 77 Hughes 2600
Re: Suggested sealant for belt line [message #345024 is a reply to message #344963] Sun, 07 July 2019 20:05 Go to previous message
dservati1 is currently offline  dservati1   
Messages: 109
Registered: December 2013
Location: Western New York -Rochest...
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Senior Member
Thanks for the suggestions!

'78 Palm Beach. car nut new to RV'ing 26 ft. 403 rebuilt in 2018, rebuilt tranny in 2014, Dave Lenzi knuckles & hubs, yada yada yada on ION wheels,Green Brady Bunch stock David Martin on Facebook
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