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[GMCnet] Sealants / Adhesives [message #43858] Thu, 21 May 2009 10:43 Go to next message
USAussie is currently offline  USAussie   United States
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
Senior Member
G'day,

Now that Double Trouble is registered I'm attacking the TTD list. I have
prioritized them by: 1) things that Helen wants fixed 2) things that I want
fixed. Number one on Helen's list was the glove compartment door - it popped
open and smacked her in the knee several times last year!. That problem has
been solved. Number two on her list was water dripping on her from the
passenger side window and that's what I'm working on now. I scraped all the
sealant around the side windows as well as the goop a PO put around the
windshield. I figure black RTV will work well there.

At any rate I did some poking around Gene's website and couldn't find any
info on sealants / adhesives. I reckon having a spread sheet that details
what sealants / adhesives to use and where would be most helpful.

For example I found that 3M - 5200 worked great on the black tank.

What do other use to:

1) seal the windows when removed
2) seal body seams that need painting
3) seal the windshield / side windows
4) seal the rear window
5) seal roof exhaust fans
6) seal roof air conditioner
7) seal roof vents

It would be good to know if they could be painted and how much / fast they
shrank.

Regards,
Rob Mueller
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
'75 Avion - USA - The Parts Coach TZE 365V100324


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Regards, Rob M. (USAussie) The Pedantic Mechanic Sydney, Australia '75 Avion - AUS - The Blue Streak TZE365V100428 '75 Avion - USA - Double Trouble TZE365V100426
Re: [GMCnet] Sealants / Adhesives [message #43868 is a reply to message #43858] Thu, 21 May 2009 12:01 Go to previous messageGo to next message
Mr ERFisher is currently offline  Mr ERFisher   United States
Messages: 7117
Registered: August 2005
Karma: 2
Senior Member
>
>


did you look here?


http://gmcmotorhome.info/body.html#leaks

and here
http://www.gmcmhphotos.com/photos/showphoto.php?photo=10105

gene


At any rate I did some poking around Gene's website and couldn't find any
> info on sealants / adhesives. I reckon having a spread sheet that details
> what sealants / adhesives to use and where would be most helpful.
>
> --
> Gene Fisher -- 74-23,77PB/ore/ca
> “Give a man a fish; you have fed him for today --- give him a URL and
> -------
> http://gmcmotorhome.info/
> Alternator Protection Cable
> http://gmcmotorhome.info/APC.html
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Re: [GMCnet] Sealants / Adhesives [message #43871 is a reply to message #43858] Thu, 21 May 2009 12:19 Go to previous messageGo to next message
Jim White[1] is currently offline  Jim White[1]   United States
Messages: 144
Registered: September 2008
Karma: 0
Senior Member
Rob-
Welcome back to what is left of America!
We had a similar leak issue from the sides of the headliner when we
cornered. I did the soapy water test using a leaf blower perched on a
step ladder with the blower extension duck taped through a hole in
plywood that filled the window space. Found that the bubbles were
minimal except through the clearance/running lights on the front roof.
The gaskets were dried up both under the lights fixtures and gaskets
under the lens. Gaskets are available from GMC vendors but getting those
rusty screws out are a be-atch.
Of course, I realize that your leaks may be elsewhere but don't discount
those lights.
Hope to see you guys on this trip-
Jim "Doc" White
Wintergreen, VA
75 GMC Stretch
************************************

Rob Mueller wrote:
> G'day,
>
> Now that Double Trouble is registered I'm attacking the TTD list. I have
> prioritized them by: 1) things that Helen wants fixed 2) things that I want
> fixed. Number one on Helen's list was the glove compartment door - it popped
> open and smacked her in the knee several times last year!. That problem has
> been solved. Number two on her list was water dripping on her from the
> passenger side window and that's what I'm working on now. I scraped all the
> sealant around the side windows as well as the goop a PO put around the
> windshield. I figure black RTV will work well there.
>
> At any rate I did some poking around Gene's website and couldn't find any
> info on sealants / adhesives. I reckon having a spread sheet that details
> what sealants / adhesives to use and where would be most helpful.
>
> For example I found that 3M - 5200 worked great on the black tank.
>
> What do other use to:
>
> 1) seal the windows when removed
> 2) seal body seams that need painting
> 3) seal the windshield / side windows
> 4) seal the rear window
> 5) seal roof exhaust fans
> 6) seal roof air conditioner
> 7) seal roof vents
>
> It would be good to know if they could be painted and how much / fast they
> shrank.
>
> Regards,
> Rob Mueller
> Sydney, Australia
> '75 Avion - AUS - The Blue Streak TZE365V100428
> '75 Avion - USA - Double Trouble TZE365V100426
> '75 Avion - USA - The Parts Coach TZE 365V100324
>
>
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
>
>
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Re: [GMCnet] Sealants / Adhesives [message #43873 is a reply to message #43868] Thu, 21 May 2009 12:25 Go to previous messageGo to next message
USAussie is currently offline  USAussie   United States
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
Senior Member
Gene,

Yes, I found: http://gmcmotorhome.info/body.html#leaks but it doesn't
mention any specific brands of sealant.

I didn't think to look at the photo site. I will see if I can find some of
the PL stuff here in Houston - THANKS!

I still think it would be a good idea to have a spread sheet with detailed
specific info on various and sundry chemicals we use to maintain the GMC..

Rob Mueller
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
'75 Avion - USA - The Parts Coach TZE 365V100324

-----Original Message-----
From: gmclist-bounces@temp.gmcnet.org
[mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of Mr.erf ERFisher
Sent: Friday, May 22, 2009 3:01 AM
To: gmclist@temp.gmcnet.org
Subject: Re: [GMCnet] Sealants / Adhesives

did you look here?

http://gmcmotorhome.info/body.html#leaks

and here
http://www.gmcmhphotos.com/photos/showphoto.php?photo=10105


gene


At any rate I did some poking around Gene's website and couldn't find any
> info on sealants / adhesives. I reckon having a spread sheet that details
> what sealants / adhesives to use and where would be most helpful.
>
> --
> Gene Fisher -- 74-23,77PB/ore/ca
> "Give a man a fish; you have fed him for today --- give him a URL and
> -------
> http://gmcmotorhome.info/
> Alternator Protection Cable
> http://gmcmotorhome.info/APC.html
_______________________________________________
GMCnet mailing list
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http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist

_______________________________________________
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Regards, Rob M. (USAussie) The Pedantic Mechanic Sydney, Australia '75 Avion - AUS - The Blue Streak TZE365V100428 '75 Avion - USA - Double Trouble TZE365V100426
Re: [GMCnet] Sealants / Adhesives [message #43874 is a reply to message #43871] Thu, 21 May 2009 12:32 Go to previous messageGo to next message
USAussie is currently offline  USAussie   United States
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
Senior Member
Doc,

Thanks for the welcome "home."

As far as the clearance lights go it's "been there, done that!" I replaced
them with LED units and all new stainless steel screws. Got lucky and only
had to replace one nut sert.

Unfortunately our route is Houston - New Orleans - Memphis - Elkhart (shop
for goodies) - Chicago - Milwaukee - Iola (antique car show) - St. Louis -
Dallas - Houston and we won't be heading as far east as Virginia.

All the best,
Rob Mueller
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
'75 Avion - USA - The Parts Coach TZE 365V100324

-----Original Message-----
From: gmclist-bounces@temp.gmcnet.org
[mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of Jim White
Sent: Friday, May 22, 2009 3:20 AM
To: gmclist@temp.gmcnet.org
Subject: Re: [GMCnet] Sealants / Adhesives

Rob-
Welcome back to what is left of America!
We had a similar leak issue from the sides of the headliner when we
cornered. I did the soapy water test using a leaf blower perched on a
step ladder with the blower extension duck taped through a hole in
plywood that filled the window space. Found that the bubbles were
minimal except through the clearance/running lights on the front roof.
The gaskets were dried up both under the lights fixtures and gaskets
under the lens. Gaskets are available from GMC vendors but getting those
rusty screws out are a be-atch.
Of course, I realize that your leaks may be elsewhere but don't discount
those lights.
Hope to see you guys on this trip-
Jim "Doc" White
Wintergreen, VA
75 GMC Stretch
************************************

Rob Mueller wrote:
> G'day,
>
> Now that Double Trouble is registered I'm attacking the TTD list. I have
> prioritized them by: 1) things that Helen wants fixed 2) things that I
want
> fixed. Number one on Helen's list was the glove compartment door - it
popped
> open and smacked her in the knee several times last year!. That problem
has
> been solved. Number two on her list was water dripping on her from the
> passenger side window and that's what I'm working on now. I scraped all
the
> sealant around the side windows as well as the goop a PO put around the
> windshield. I figure black RTV will work well there.
>
> At any rate I did some poking around Gene's website and couldn't find any
> info on sealants / adhesives. I reckon having a spread sheet that details
> what sealants / adhesives to use and where would be most helpful.
>
> For example I found that 3M - 5200 worked great on the black tank.
>
> What do other use to:
>
> 1) seal the windows when removed
> 2) seal body seams that need painting
> 3) seal the windshield / side windows
> 4) seal the rear window
> 5) seal roof exhaust fans
> 6) seal roof air conditioner
> 7) seal roof vents
>
> It would be good to know if they could be painted and how much / fast they
> shrank.
>
> Regards,
> Rob Mueller
> Sydney, Australia
> '75 Avion - AUS - The Blue Streak TZE365V100428
> '75 Avion - USA - Double Trouble TZE365V100426
> '75 Avion - USA - The Parts Coach TZE 365V100324
>
>
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
>
>
_______________________________________________
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Regards, Rob M. (USAussie) The Pedantic Mechanic Sydney, Australia '75 Avion - AUS - The Blue Streak TZE365V100428 '75 Avion - USA - Double Trouble TZE365V100426
Re: [GMCnet] Sealants / Adhesives [message #43886 is a reply to message #43858] Thu, 21 May 2009 13:25 Go to previous messageGo to next message
Matt Colie is currently offline  Matt Colie   United States
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
Senior Member
Robert Mueller wrote on Thu, 21 May 2009 11:43

G'day,
<snip>
For example I found that 3M - 5200 worked great on the black tank.
Regards,
Rob Mueller


Rob (and any others),

3M-5200 is a polyurethane that is extremely tenacious - even uncured. You know that now.
If you are going to use it, have some mineral spirits or kerosene around to clean up. You will probably need that and about a roll and an half of paper towels (don’t even think of try to stretch the use of these - just wipe and toss).

When you find out where some ended up that you didn’t really want it to be, go get some De-Bond. It comes in three prices Automotive, Handyman and Marine. It seems to all be the same, but maybe they felt guilty trying to charge so much more for the RV or Aircraft versions. It will loosen the grip of most all polyurethanes and polysulfides.

I use these sealants all the time and now all I have to do is decide if I love or hate them.

Matt


Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
Re: [GMCnet] Sealants / Adhesives [message #43902 is a reply to message #43871] Thu, 21 May 2009 17:09 Go to previous messageGo to next message
Tim Conway is currently offline  Tim Conway   United States
Messages: 412
Registered: September 2005
Location: Long Island, New York
Karma: 0
Senior Member

On May 21, 2009, at 1:19 PM, Jim White wrote:

> Welcome back to what is left of America!


Did Texas leave? Alaska?

Tim Conway
LI NY 78 PB
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Re: [GMCnet] Sealants / Adhesives [message #43922 is a reply to message #43873] Thu, 21 May 2009 19:21 Go to previous messageGo to next message
GMCWiperMan is currently offline  GMCWiperMan   United States
Messages: 1248
Registered: December 2007
Karma: 1
Senior Member
Rob,

PL Polyurethane is usually at both Lowes and Home Depot. It comes in white
"Door and Window", gray "Concrete", black "gutter seal", and maybe some more
they snuck in while I wasn't watching. I called their tech support section
to find out the difference between them. "Color".

Just remember my experience with using it under automotive enamel. As
promised by PL, it stands up well -- but the paint does Not adhere to it.

More in another note I need to do some research to complete.

Ken H.


-----Original Message-----
...

I didn't think to look at the photo site. I will see if I can find some of
the PL stuff here in Houston - THANKS!
...

Rob Mueller

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Re: [GMCnet] Sealants / Adhesives [message #43924 is a reply to message #43858] Thu, 21 May 2009 19:43 Go to previous messageGo to next message
GMCWiperMan is currently offline  GMCWiperMan   United States
Messages: 1248
Registered: December 2007
Karma: 1
Senior Member
Rob,

After having new windshields installed, there was still leakage across the
top of the windshield. Before the Topeka paint job, while I still thought
PL Polyurethane was good for EVERYTHING, I applied it between the fiberglass
and the rubber gasket. Made a nice smooth surface and seemed to stop the
leaking; I had them paint right over the polyurethane.

After 3 years or so, not only did the paint crack and come off of the PL,
but the caulk itself began to develop wide cracks every 2"-3". Obviously,
the leaks returned.

Then I did what I should have done in the first place: Sought some
professional advice. The paint & body man told me to scrape all that mess
out and replace it with black 3M butyl rope caulk. I did, and it's still
pristine 3 years or so later -- not covered in road dust like I thought it
would be. And it's hardly noticeable that it's not exactly the same as the
metallic black "raccoon mask".

I thought I had the box with the remaining 3M butyl, but can't find it.
It's about 3/4"x3"x12", white with green print. Calling it "rope caulk" is
sort of misleading: the rope is cut into 12" lengths and laid side-by-side
so that it forms ridged rectangle. Dividing paper between layers keeps it
from becoming a single block. Pulled apart at the ridges, you can easily
stick the strips end-to-end for as long as needed or take pieces
side-by-side and knead them together by rolling between palms on a table top
to make a larger diameter rope. Handy stuff.

Ken Henderson
Americus, GA
GMCWipersEtc.com
'76 X-Birchaven


-----Original Message-----
...

At any rate I did some poking around Gene's website and couldn't find any
info on sealants / adhesives. I reckon having a spread sheet that details
what sealants / adhesives to use and where would be most helpful.

For example I found that 3M - 5200 worked great on the black tank.

What do other use to:

1) seal the windows when removed
2) seal body seams that need painting
3) seal the windshield / side windows
4) seal the rear window
5) seal roof exhaust fans
6) seal roof air conditioner
7) seal roof vents

It would be good to know if they could be painted and how much / fast they
shrank.

Regards,
Rob Mueller

_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist

Re: [GMCnet] Sealants / Adhesives [message #43928 is a reply to message #43924] Thu, 21 May 2009 20:32 Go to previous messageGo to next message
USAussie is currently offline  USAussie   United States
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
Senior Member
Ken,

I just finished the first go at scraping all the various sealants PO's have
applied around the side windows and top of the windshield, I figure I've got
another good days work cleaning it back to a good surface for the sealant to
stick to.

It sounds like 3M butyl rope caulk is what the PO of The Blue Streak used in
Australia. Kinda looks and feels like black tar?

At any rate I will find some for Double Trouble.

THANKS, MATE!

Regards,
Rob Mueller
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
'75 Avion - USA - The Parts Coach TZE 365V100324

-----Original Message-----
From: gmclist-bounces@temp.gmcnet.org
[mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of Ken Henderson
Sent: Friday, May 22, 2009 10:44 AM
To: gmclist@temp.gmcnet.org
Subject: Re: [GMCnet] Sealants / Adhesives

Rob,

After having new windshields installed, there was still leakage across the
top of the windshield. Before the Topeka paint job, while I still thought
PL Polyurethane was good for EVERYTHING, I applied it between the fiberglass
and the rubber gasket. Made a nice smooth surface and seemed to stop the
leaking; I had them paint right over the polyurethane.

After 3 years or so, not only did the paint crack and come off of the PL,
but the caulk itself began to develop wide cracks every 2"-3". Obviously,
the leaks returned.

Then I did what I should have done in the first place: Sought some
professional advice. The paint & body man told me to scrape all that mess
out and replace it with black 3M butyl rope caulk. I did, and it's still
pristine 3 years or so later -- not covered in road dust like I thought it
would be. And it's hardly noticeable that it's not exactly the same as the
metallic black "raccoon mask".

I thought I had the box with the remaining 3M butyl, but can't find it.
It's about 3/4"x3"x12", white with green print. Calling it "rope caulk" is
sort of misleading: the rope is cut into 12" lengths and laid side-by-side
so that it forms ridged rectangle. Dividing paper between layers keeps it
from becoming a single block. Pulled apart at the ridges, you can easily
stick the strips end-to-end for as long as needed or take pieces
side-by-side and knead them together by rolling between palms on a table top
to make a larger diameter rope. Handy stuff.

Ken Henderson
Americus, GA
GMCWipersEtc.com
'76 X-Birchaven


-----Original Message-----
...

At any rate I did some poking around Gene's website and couldn't find any
info on sealants / adhesives. I reckon having a spread sheet that details
what sealants / adhesives to use and where would be most helpful.

For example I found that 3M - 5200 worked great on the black tank.

What do other use to:

1) seal the windows when removed
2) seal body seams that need painting
3) seal the windshield / side windows
4) seal the rear window
5) seal roof exhaust fans
6) seal roof air conditioner
7) seal roof vents

It would be good to know if they could be painted and how much / fast they
shrank.

Regards,
Rob Mueller

_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist

_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist



Regards, Rob M. (USAussie) The Pedantic Mechanic Sydney, Australia '75 Avion - AUS - The Blue Streak TZE365V100428 '75 Avion - USA - Double Trouble TZE365V100426
Re: [GMCnet] Sealants / Adhesives [message #43929 is a reply to message #43858] Thu, 21 May 2009 20:40 Go to previous messageGo to next message
Steven Ferguson is currently offline  Steven Ferguson   United States
Messages: 3447
Registered: May 2006
Karma: 0
Senior Member
Rob,
So far it sounds like all you need to save yourself and your marriage
is a roll of duct tape!

On Thu, May 21, 2009 at 8:43 AM, Rob Mueller <robmueller@iinet.net.au> wrote:
> G'day,
>
> Now that Double Trouble is registered I'm attacking the TTD list. I have
> prioritized them by: 1) things that Helen wants fixed 2) things that I want
> fixed. Number one on Helen's list was the glove compartment door - it popped
> open and smacked her in the knee several times last year!. That problem has
> been solved. Number two on her list was water dripping on her from the
> passenger side window and that's what I'm working on now. I scraped all the
> sealant around the side windows as well as the goop a PO put around the
> windshield. I figure black RTV will work well there.
>--
Steve Ferguson
'76 EII
Sierra Vista, AZ
Urethane bushing source
www.bdub.net/ferguson/
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Re: [GMCnet] Sealants / Adhesives [message #43934 is a reply to message #43929] Thu, 21 May 2009 21:04 Go to previous messageGo to next message
USAussie is currently offline  USAussie   United States
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
Senior Member
Steve,

Nope, that's what I used last year and it leaked! ;-)

Regards,
Rob

-----Original Message-----
From: gmclist-bounces@temp.gmcnet.org
[mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of Steven Ferguson
Sent: Friday, May 22, 2009 11:40 AM
To: gmclist@temp.gmcnet.org
Subject: Re: [GMCnet] Sealants / Adhesives

Rob,
So far it sounds like all you need to save yourself and your marriage
is a roll of duct tape!

Steve Ferguson
'76 EII
Sierra Vista, AZ
Urethane bushing source
www.bdub.net/ferguson/
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Regards, Rob M. (USAussie) The Pedantic Mechanic Sydney, Australia '75 Avion - AUS - The Blue Streak TZE365V100428 '75 Avion - USA - Double Trouble TZE365V100426
Re: [GMCnet] Sealants / Adhesives [message #43936 is a reply to message #43928] Thu, 21 May 2009 21:15 Go to previous messageGo to next message
GMCWiperMan is currently offline  GMCWiperMan   United States
Messages: 1248
Registered: December 2007
Karma: 1
Senior Member
Yep -- very sticky black tar that doesn't get hard.

Ken Henderson
Americus, GA
GMCWipersEtc.com
'76 X-Birchaven


-----Original Message-----
Ken,

I just finished the first go at scraping all the various sealants PO's have
applied around the side windows and top of the windshield, I figure I've got
another good days work cleaning it back to a good surface for the sealant to
stick to.

It sounds like 3M butyl rope caulk is what the PO of The Blue Streak used in
Australia. Kinda looks and feels like black tar?

At any rate I will find some for Double Trouble.

THANKS, MATE!

Regards,
Rob Mueller

_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist

Re: [GMCnet] Sealants / Adhesives [message #43942 is a reply to message #43928] Thu, 21 May 2009 21:58 Go to previous messageGo to next message
Ray Erspamer is currently offline  Ray Erspamer   United States
Messages: 1707
Registered: May 2007
Location: Milwaukee Wisconsin
Karma: -3
Senior Member

3M makes a product called Body Seam Sealer.......supposed to be very good with great paint adhesion....I will find out after I paint

Ray & Lisa Erspamer
78 Royale Center Kitchen
The Malosco Cruiser (TZE368V101144)
Wauwatosa, Wisconsin 53226
Email: 78GMC-Royale@att.net
414-745-3188
Web Site: http://ray-lisa.page.tl/



----- Original Message ----
From: Rob Mueller <robmueller@iinet.net.au>
To: gmclist@temp.gmcnet.org
Sent: Thursday, May 21, 2009 8:32:17 PM
Subject: Re: [GMCnet] Sealants / Adhesives

Ken,

I just finished the first go at scraping all the various sealants PO's have
applied around the side windows and top of the windshield, I figure I've got
another good days work cleaning it back to a good surface for the sealant to
stick to.

It sounds like 3M butyl rope caulk is what the PO of The Blue Streak used in
Australia. Kinda looks and feels like black tar?

At any rate I will find some for Double Trouble.

THANKS, MATE!

Regards,
Rob Mueller
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
'75 Avion - USA - The Parts Coach TZE 365V100324

-----Original Message-----
From: gmclist-bounces@temp.gmcnet.org
[mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of Ken Henderson
Sent: Friday, May 22, 2009 10:44 AM
To: gmclist@temp.gmcnet.org
Subject: Re: [GMCnet] Sealants / Adhesives

Rob,

After having new windshields installed, there was still leakage across the
top of the windshield. Before the Topeka paint job, while I still thought
PL Polyurethane was good for EVERYTHING, I applied it between the fiberglass
and the rubber gasket. Made a nice smooth surface and seemed to stop the
leaking; I had them paint right over the polyurethane.

After 3 years or so, not only did the paint crack and come off of the PL,
but the caulk itself began to develop wide cracks every 2"-3". Obviously,
the leaks returned.

Then I did what I should have done in the first place: Sought some
professional advice. The paint & body man told me to scrape all that mess
out and replace it with black 3M butyl rope caulk. I did, and it's still
pristine 3 years or so later -- not covered in road dust like I thought it
would be. And it's hardly noticeable that it's not exactly the same as the
metallic black "raccoon mask".

I thought I had the box with the remaining 3M butyl, but can't find it.
It's about 3/4"x3"x12", white with green print. Calling it "rope caulk" is
sort of misleading: the rope is cut into 12" lengths and laid side-by-side
so that it forms ridged rectangle. Dividing paper between layers keeps it
from becoming a single block. Pulled apart at the ridges, you can easily
stick the strips end-to-end for as long as needed or take pieces
side-by-side and knead them together by rolling between palms on a table top
to make a larger diameter rope. Handy stuff.

Ken Henderson
Americus, GA
GMCWipersEtc.com
'76 X-Birchaven


-----Original Message-----
...

At any rate I did some poking around Gene's website and couldn't find any
info on sealants / adhesives. I reckon having a spread sheet that details
what sealants / adhesives to use and where would be most helpful.

For example I found that 3M - 5200 worked great on the black tank.

What do other use to:

1) seal the windows when removed
2) seal body seams that need painting
3) seal the windshield / side windows
4) seal the rear window
5) seal roof exhaust fans
6) seal roof air conditioner
7) seal roof vents

It would be good to know if they could be painted and how much / fast they
shrank.

Regards,
Rob Mueller

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Ray Erspamer 78 GMC Royale Center Kitchen 403, 3.70 Final Drive Holley Sniper Quadrajet EFI System, Holley Hyperspark Ignition System 414-484-9431
Re: [GMCnet] Sealants / Adhesives [message #43993 is a reply to message #43942] Fri, 22 May 2009 08:28 Go to previous messageGo to next message
powerjon is currently offline  powerjon   United States
Messages: 2446
Registered: January 2004
Karma: 5
Senior Member
Ray,
The 3M Ultrapro body Seam sealer is what Topeka uses to seal all the
seams on the body before priming, but it can also be used after
priming. It provides excellent paint adhesion.

http://tinyurl.com/qtbm7p


J.R. Wright
GMC GreatLaker
77 Eleganza Custom (For Sale)
1975 Avion (Under Reconstruction)
Michigan

On May 21, 2009, at 10:58 PM, Ray Erspamer wrote:

>
> 3M makes a product called Body Seam Sealer......supposedto be very
> good with great paint adhesion....I will find out after I paint
>
> Ray & Lisa Erspamer
> 78 Royale Center Kitchen
> The Malosco Cruiser (TZE368V101144)
> Wauwatosa, Wisconsin 53226
> Email: 78GMC-Royale@att.net
> 414-745-3188
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J.R. Wright
GMC GreatLaker
GMC Eastern States
GMCMI
78 30' Buskirk Stretch
75 Avion Under Reconstruction
Michigan
Re: [GMCnet] Sealants / Adhesives [message #43997 is a reply to message #43928] Fri, 22 May 2009 08:58 Go to previous messageGo to next message
shawnee is currently offline  shawnee   United States
Messages: 422
Registered: February 2004
Location: NC
Karma: 0
Senior Member
Robert Mueller wrote on Thu, 21 May 2009 21:32

Ken,

I just finished the first go at scraping all the various sealants PO's have
applied around the side windows and top of the windshield, I figure I've got
another good days work cleaning it back to a good surface for the sealant to
stick to.

It sounds like 3M butyl rope caulk is what the PO of The Blue Streak used in
Australia. Kinda looks and feels like black tar?

At any rate I will find some for Double Trouble.

THANKS, MATE!

Regards,
Rob Mueller
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
'75 Avion - USA - The Parts Coach TZE 365V100324




Rob,

Try butyl rubber tape. We use it for windows and any thing we put on the coach. You can get it in 1/2 inch wide, 3/16 inch thickm, and 25 foot rolls. If you can't find it, I can send you some. Camper World or most RV places will have it.



Gene Dotson
74 Canyonlands
www.bdub.net/Motorhome_Enhancements New Windows and Aluminum Radiators
Lexal [message #44000 is a reply to message #43858] Fri, 22 May 2009 09:47 Go to previous messageGo to next message
bukzin is currently offline  bukzin   United States
Messages: 840
Registered: April 2004
Location: North California
Karma: 0
Senior Member
We have used some caulking from Lexal which seems very good
around sinks and toilets.

Comes in clear and white, maybe more colors.


Anyone try this stuff?

Bukzin


Bukzin
1977 Palm Beach
[GMCnet] Seminar - Sealants / Adhesives -Leak Sources [message #44001 is a reply to message #43858] Fri, 22 May 2009 09:50 Go to previous messageGo to next message
druber is currently offline  druber   United States
Messages: 58
Registered: March 2004
Location: Syracuse, IN
Karma: 0
Member
We are planning to have a seminar on leak sources and repair thereof. Do any of you
consider yourselves knowledgeable in the various types of sealants to use/not use for
what purpose, and would you be interested in participating in the seminar? Or if you
can recommend someone, that would be helpful as well. Forrest Crow has found 30+ leak
sources he is going to talk about and it would be nice to have someone authoritative
on proper sealants and usage. As an alternative, I may try to get a 3M guy there to
expound upon sealants/adhesives and other products of theirs that we may find useful.
Would many of you find that helpful?
Regards, Druber

-----Original Message-----
From: gmclist-bounces@temp.gmcnet.org [mailto:gmclist-bounces@temp.gmcnet.org] On
Behalf Of Rob Mueller
Sent: Thursday, May 21, 2009 11:43 AM
To: gmclist@temp.gmcnet.org
Subject: [GMCnet] Sealants / Adhesives


G'day,

Now that Double Trouble is registered I'm attacking the TTD list. I have prioritized
them by: 1) things that Helen wants fixed 2) things that I want fixed. Number one on
Helen's list was the glove compartment door - it popped open and smacked her in the
knee several times last year!. That problem has been solved. Number two on her list
was water dripping on her from the passenger side window and that's what I'm working
on now. I scraped all the sealant around the side windows as well as the goop a PO put
around the windshield. I figure black RTV will work well there.

At any rate I did some poking around Gene's website and couldn't find any info on
sealants / adhesives. I reckon having a spread sheet that details what sealants /
adhesives to use and where would be most helpful.

For example I found that 3M - 5200 worked great on the black tank.

What do other use to:

1) seal the windows when removed
2) seal body seams that need painting
3) seal the windshield / side windows
4) seal the rear window
5) seal roof exhaust fans
6) seal roof air conditioner
7) seal roof vents

It would be good to know if they could be painted and how much / fast they shrank.

Regards,
Rob Mueller
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
'75 Avion - USA - The Parts Coach TZE 365V100324


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Re: [GMCnet] Seminar - Sealants / Adhesives -Leak Sources [message #44002 is a reply to message #44001] Fri, 22 May 2009 09:58 Go to previous messageGo to next message
lawyerjpg is currently offline  lawyerjpg   United States
Messages: 27
Registered: July 2006
Karma: 0
Junior Member
Is this seminar going to be at the CO GMCMI? or sometime later?
Jim Grissom
from one Hoosier to another
not that many of us
----- Original Message -----
From: "Ray Swartzendruber" <redruber@gmail.com>
To: <gmclist@temp.gmcnet.org>
Sent: Friday, May 22, 2009 9:50 AM
Subject: [GMCnet] Seminar - Sealants / Adhesives -Leak Sources


> We are planning to have a seminar on leak sources and repair thereof. Do
> any of you
> consider yourselves knowledgeable in the various types of sealants to
> use/not use for
> what purpose, and would you be interested in participating in the seminar?
> Or if you
> can recommend someone, that would be helpful as well. Forrest Crow has
> found 30+ leak
> sources he is going to talk about and it would be nice to have someone
> authoritative
> on proper sealants and usage. As an alternative, I may try to get a 3M
> guy there to
> expound upon sealants/adhesives and other products of theirs that we may
> find useful.
> Would many of you find that helpful?
> Regards, Druber
>
> -----Original Message-----
> From: gmclist-bounces@temp.gmcnet.org
> [mailto:gmclist-bounces@temp.gmcnet.org] On
> Behalf Of Rob Mueller
> Sent: Thursday, May 21, 2009 11:43 AM
> To: gmclist@temp.gmcnet.org
> Subject: [GMCnet] Sealants / Adhesives
>
>
> G'day,
>
> Now that Double Trouble is registered I'm attacking the TTD list. I have
> prioritized
> them by: 1) things that Helen wants fixed 2) things that I want fixed.
> Number one on
> Helen's list was the glove compartment door - it popped open and smacked
> her in the
> knee several times last year!. That problem has been solved. Number two on
> her list
> was water dripping on her from the passenger side window and that's what
> I'm working
> on now. I scraped all the sealant around the side windows as well as the
> goop a PO put
> around the windshield. I figure black RTV will work well there.
>
> At any rate I did some poking around Gene's website and couldn't find any
> info on
> sealants / adhesives. I reckon having a spread sheet that details what
> sealants /
> adhesives to use and where would be most helpful.
>
> For example I found that 3M - 5200 worked great on the black tank.
>
> What do other use to:
>
> 1) seal the windows when removed
> 2) seal body seams that need painting
> 3) seal the windshield / side windows
> 4) seal the rear window
> 5) seal roof exhaust fans
> 6) seal roof air conditioner
> 7) seal roof vents
>
> It would be good to know if they could be painted and how much / fast they
> shrank.
>
> Regards,
> Rob Mueller
> Sydney, Australia
> '75 Avion - AUS - The Blue Streak TZE365V100428
> '75 Avion - USA - Double Trouble TZE365V100426
> '75 Avion - USA - The Parts Coach TZE 365V100324
>
>
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist

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Re: [GMCnet] Seminar - Sealants / Adhesives -Leak Sources [message #44003 is a reply to message #44001] Fri, 22 May 2009 10:00 Go to previous messageGo to previous message
tmaki is currently offline  tmaki   United States
Messages: 200
Registered: September 2005
Karma: 0
Senior Member
Ray Swartzendruber wrote:
> We are planning to have a seminar on leak sources and repair thereof. Do any of you
> consider yourselves knowledgeable in the various types of sealants to use/not use for
> what purpose,


Would you be interested in what RV manufacturers use in
current production? Contrary to popular belief, envelope
leaks are a major concern, and manufacturers really do look
for sealants that are both effective and budget-friendly.

If interested, I can probably round up some info from a few
manufacturers both from a production POV and service/repair
perspectives. Proprietary info excluded.

What's your timetable?




Toby Maki
'73 Glacier 230
Riverside, CA
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