'74 body side moulding seal

[steve southworth]

Having the coach repainted. Removed the body side moulding. Not an easy job. Had to use care not to bend the stainless steel mounting.

When taking off the SS it appeared there were two narrow strips of butyl rubber doing the sealing. The strips appeared to be about 1/4" wide. One on
the upper aluminum to aluminum extrusion. The other on the aluminum extrusion to fiberglass. These butyl strips appeared to have a fabric stripe
facing that caused the butyl not to stick as strongly to the SS. It was very adhered to the body. No signs of leakage onto the extrusion.

What does nayone know about these butyl strips, the facing, and is it still available?

It is amazing that after 47 years the rubber is still flexible and sticky. It sticks extremely well to shoe soles when it is stepped on.
--
Steve Southworth
1974 Glacier TZE064V100150 (for workin on)
1975 Transmode TZE365V100394 (parts & spares)
Palmyra WI

 

[sgltrac]

Steve,

You can buy that in rolls at hardware stores. Used for setting house
windows. The rolls I’ve seen are ribbon about 3/4” wide and 1/8” thick.
Will provide decent hold with accompanying screws / rivets.

Sully
Bellevue wa

On Thu, Jul 8, 2021 at 11:57 AM Steve Southworth
wrote:

> Having the coach repainted. Removed the body side moulding. Not an easy
> job. Had to use care not to bend the stainless steel mounting.
>
> When taking off the SS it appeared there were two narrow strips of butyl
> rubber doing the sealing. The strips appeared to be about 1/4" wide. One
> on
> the upper aluminum to aluminum extrusion. The other on the aluminum
> extrusion to fiberglass. These butyl strips appeared to have a fabric
> stripe
> facing that caused the butyl not to stick as strongly to the SS. It was
> very adhered to the body. No signs of leakage onto the extrusion.
>
> What does nayone know about these butyl strips, the facing, and is it
> still available?
>
> It is amazing that after 47 years the rubber is still flexible and sticky.
> It sticks extremely well to shoe soles when it is stepped on.
> --
> Steve Southworth
> 1974 Glacier TZE064V100150 (for workin on)
> 1975 Transmode TZE365V100394 (parts & spares)
> Palmyra WI
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
>

 

[Richard RV]

Steve,

I don't think that it really matters about the facing on the butyl tape as the stainless molding will probably stay on for another twenty or thirty
years after your paint job. The extra stickiness to the stainless won't affect anything.

There is one possible exception, and it's probably a remote one - the facing might be a belt and suspenders approach as a barrier preventing the
stainless from contacting the aluminum extrusion and creating that undesirable dissimilar metals galvanic reaction. Just a guess...

Richard
--
'77 Birchaven TZE...777;
'76 Palm Beach with 18,477 verified miles;
‘76 Edgemonte

 

[jim kanomata1]

Call and discuss with JIm Bounds of Coop as he does tons or that type of
work and can help you.

> Steve,
>
> I don't think that it really matters about the facing on the butyl tape as
> the stainless molding will probably stay on for another twenty or thirty
> years after your paint job. The extra stickiness to the stainless won't
> affect anything.
>
> There is one possible exception, and it's probably a remote one - the
> facing might be a belt and suspenders approach as a barrier preventing the
> stainless from contacting the aluminum extrusion and creating that
> undesirable dissimilar metals galvanic reaction. Just a guess...
>
> Richard
> --
> '77 Birchaven TZE...777;
> '76 Palm Beach with 18,477 verified miles;
> ‘76 Edgemonte
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
>

--
Jim Kanomata ASE
Applied/GMC, Newark,CA
jimk
http://www.gmcrvparts.com
1-800-752-7502

 

[Tom Katzenberger]

It may also be a good time to preempt the possibility of chipmunk cheeks. I drilled additional holes in the molding and replaced all screws with #10
stainless screws which were long enough to go all the way through the panel. This in theory will prevent the side panels from bulging and developing
"Chipmunk Cheeks".
--
Tom & Oki Katzenberger,
Kingsville, Maryland,
1977 23' Birchaven, 455 C.I.D.