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Seam Sealer
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uncltank
Posted 2012-04-30 10:12 AM (#318993)
Subject: Seam Sealer


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Location: Kennewick Wa
Yesterday, I was removing the old, cracked seam sealer from my 57 Dodge firewall. I noticed that some of the sealer was applied before it was painted (under was clean bare metal) and some was after it was painted (under was shiny paint). Any ideas as to why this was done? How should it be applied? Any help would be appreciated... Dallas
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springsweptwing
Posted 2012-05-01 5:49 AM (#319097 - in reply to #318993)
Subject: RE: Seam Sealer



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Dallas,

some of the sealer was applied before paint usually around the tops of the door post around the inner rockers/floor and inside trunk, the original stuff is not like the modern sealer, it looks to be tar based and becomes brittle and breaks away easy,

one of the best ways to do it is buy the sealer in tubes which go in a caulking gun apply a bead all the way around the seam then go over with a brush and spread it flat, that way your not stoping and starting with the brush applied out of a tin, always use the sealer after you have primed the area,

another thing that was a bad idea on a non undercoated car the seams on the underside are open leaving moisture to get under the sealer on the inside floor and trunk area

Paul.
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60 dart
Posted 2012-05-01 3:47 PM (#319158 - in reply to #318993)
Subject: Re: Seam Sealer



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don't buy the canned sealer , you won't like it ! ------------------------------------------------------------later
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Powerflite
Posted 2017-09-02 9:52 PM (#547605 - in reply to #318993)
Subject: RE: Seam Sealer



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Location: So. California
I made a mess with this 3M seam sealer on my New Yorker. What is the best way to clean it up? Can I sand it smooth after it dries?



(MessySeamSealer.jpg)



Attachments
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Attachments MessySeamSealer.jpg (118KB - 13 downloads)
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mikes2nd
Posted 2017-09-02 10:48 PM (#547609 - in reply to #318993)
Subject: Re: Seam Sealer


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I use tape to outline an exposed area, put the seam sealer down and pull the tape and leave a nice line or I free hand sculpt is a hidden area normally, you need a pair of gloves and spread it nicely.

You can sand but its not the best. I use the bare metal 3m seam sealer.

Did you apply the ezsand stuff?

 

https://www.youtube.com/watch?v=5BEVI5FCYd4

https://www.youtube.com/watch?v=CaYJrmaIf-s

https://www.youtube.com/watch?v=dH2CF7wQDuk



Edited by mikes2nd 2017-09-02 11:07 PM
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Powerflite
Posted 2017-09-04 1:06 AM (#547705 - in reply to #318993)
Subject: Re: Seam Sealer



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Masking it off is a good idea that I shoulda done. I will attempt to sand it tomorrow and see how it goes.
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60 dart
Posted 2017-09-04 4:24 AM (#547707 - in reply to #318993)
Subject: Re: Seam Sealer



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Location: WHEELING,WV.>>>HOME OF WWVA
taping will work but if one would take a 1" pure bristle brush , cut horizontal @ 1/2" off , leaving stubby , more stiff bristles . put down the sealer in a narrow ribbon 1/4 or less and draw the brush up the seam
only one time and trying to stay centered . you might go through a bunch of brushes during a sealing session but it works/looks pretty well ----------------------------------------------later


wire wheel might be the best/fastest way to remove it . sanding will just gum up things

Edited by 60 dart 2017-09-04 4:27 AM
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ttotired
Posted 2017-09-04 5:10 PM (#547740 - in reply to #318993)
Subject: Re: Seam Sealer



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Personally, I am not to fussy with seam sealer, do you think the factory guys lost any sleep over it obviously, you don't want it all over the place, but a bit messy is acceptable

Make it too neat and it kind of detracts from the car to me, but if your trying to make a show pony, then neatness becomes an issue

I would use more than you have as well to make a bead

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Powerflite
Posted 2017-09-05 7:24 PM (#547802 - in reply to #318993)
Subject: Re: Seam Sealer



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I ended up just using the wire wheel on a grinder and removed everything. Sanding was a waste of time, it's too rubbery. After sanding the primer layer to feather out the damage, then I re-primed and started over. To re-apply it, I used a small scraper at a 45 degree angle to keep it uniform and used tape to mask off the top & bottom where I didn't want it. The tape worked as a guide for my scraper too, so that was nice. I immediately cleaned up small messes with acetone. At first, I thought acetone would be too harsh, but not so. This stuff is tough to get off. Thanks for all the help.
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mikes2nd
Posted 2017-09-05 7:46 PM (#547803 - in reply to #318993)
Subject: Re: Seam Sealer


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yeah its why 3m makes a "sandable" version.

the easy way ive found is put a torch to it and scrape.
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