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Discussion Starter #1
Going to be installing front fenders on 68 XR7 in next couple of days. I had thought that the caulk or sealer under the front fenders that was squished out had been a strip caulk but no real knowledge. Today I went to purchase strip caulk. After looking at it I don't think this is right. Was it maybe a seam sealer? Also I would have thought it was a greyish black but it was 44 years old and dirty. Do yall think it was grey or black when it was new? Thanks Harv
 

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I've had luck using the 3M strip chalking. Comes in a small box with strips about 1/4 round and about 10" long. Lay them on the inner lip of the fender then install it. It will compress and provide the seal like the original
 

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Mine still has it's original un molested fenders and the caulk or whatever under it that squished out is a light gray ish color on my 68 fwiw
 

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The product can turn colors when exposed to the elements and with time. You can often see the original color by cutting through the stuff or looking under items where it has not been exposed. May be asbestos in the chalking (since it turns a lighter tone) like the sound deadener in the front wheell wells The later (70-80s) NOS service replacement stuff is light gray Just a thought ;)
 

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Discussion Starter #5
I am thinking it was a light grey also. the way it squished out the fenders on original is making me think more like a seam sealer than a strip caulk.
 

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i'm certain fomoco didn't have helen housewife laying out strip caulking---rather a large extrusion gun that laid down a 1 1/4 wide bead of something
i'd assemble the fenders dry with some .020 nylon washers betwee the inner fender and the fender---same for under the bolt heads--then check hood fit and fender extension fit--one would be very surprised what .020/.040 shim would do
the assy line guys had less than two minutes to install each front fender--just think how backed up the assy line got if you spent half a day screwing with the fenders
 

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Discussion Starter #7
Two minutes? That is totally amazing that this car was bucked and built in two days! I have no idea how although I have seen assembly videos that they could put everything together so quickly and get anything right! I want to duplicate the caulking though just cause.
 

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Going to be installing front fenders on 68 XR7 in next couple of days. I had thought that the caulk or sealer under the front fenders that was squished out had been a strip caulk but no real knowledge. Today I went to purchase strip caulk. After looking at it I don't think this is right. Was it maybe a seam sealer? Also I would have thought it was a greyish black but it was 44 years old and dirty. Do yall think it was grey or black when it was new? Thanks Harv
Harvey,

A small bit of input here..I would have kept my front fenders off for a lot longer time if I had to do it over again..John Benoit pointed out that you can get a LOT of engine and compartment work done easier and with less stress if you have these off, and some of the last work you want to do is to align the hood and fenders. Everything affects everything with these lines and seams between the doors, etc..

There is a ton of engine compartment (Brakes, Suspension, cooling, heat/AC, etc) work that takes a ton of time. Not to mention Windows and windsheild..

Once you have all that buttoned up, if you can have your body specialist come over or do it all at his shop, then you can do the final Door alignment and fenders and hood.

It's easy to get some steps done early, but it isn't always the right sequence if you're striving for perfection ;)

Also..it is a personal preference thing with regard to the seam sealer under the fenders. I dont' think many concours restorers really worry about it. it just makes a dayum mess, usually. BUT, if you're gonna drive the car and want to eliminate leaks and rattles and squeeks, I suppose you might want it?


Pinstripes are one of the last things to do too, by the way. Ask me how I know..
 

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What Brian said. The front end was one of the last things I put together, the engine bay was 95% complete before the front end went on. And Brian is also right about use of seam sealer, many guys do not like to use it, myself and KTL included. KTL puts strip caulk on from underneath afterwards, says it makes aligning the fenders too difficult if it is with a mess of goo under the joint. I have not even put any on my car yet, and I drive it! It on on the over-the-winter to-do list though!
 

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Ok (to narrow it down a bit) when and where was the car built? Likely have a few hundred pictures showing this detail - this will help us compare apples to apples ;)
 

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Discussion Starter #11
Dearborn, built ? I think December 28th, 67. For the rest of you I am listening. Trying to soak all this in. Would love to learn from mistakes made in the past from others than my own. Doesn't seem to work like that much though./
 

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An example of what we're seeing once the chalking is exposed to the elements or harsh conditions
An example of an original (believe this was under 20K miles) chalking (Assembled in the spring - 68 at Dearborn
Have an example (light gray) with a cross section (cut through showing the original dark color) but can't find the pic this moment. This comes up every so often over on the Mustang side of the hobby ;) Hope this helps
 

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I have checked this out on many Cougars and Mustangs and have found that it is indeed strip caulk, I have also found the same thing wadded up and stuffed into crevices that was to large for regular sealer under the fenders and in quarter areas. In the weld and sealant manual I quote "ESB-M4G032-A synthetic resin plastic sealer,color gray or black. This sealer is specified for hand applied and is applied in daubs or extruded beads or ribbon as required."
 

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Discussion Starter #14
Towcat that is awesome. I am thinking now A good plan would be to listen to folks here and hold off on the caulk. I am going to compromise a little though. I am going to have the painter set the quarters (without caulk) so that he can get the doors and stuff aligned. Then I will have the pin stripes painted on. Then the car will brought back and placed in my barn. I can carefully remove the fenders then and put them in storage while I work on the car. I like the idea of not having to worry about them as I work on the car including installation of windshield and engine. I also agree it will be much easier to install various parts that way.
 
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