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what size FRONT glass sealant tape for my 70 challenger? #2919653
05/07/21 12:05 PM
05/07/21 12:05 PM
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renton, Washington
ph23vo Offline OP
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5/16 or 3/8? going to put my windows in and the guy asked me the thickness i need any help appr thanks

Re: what size FRONT glass sealant tape for my 70 challenger? [Re: ph23vo] #2919950
05/08/21 11:40 AM
05/08/21 11:40 AM
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Apollo, PA.
B1MAXX Offline
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Probably either, I remember years ago when I would replace a windshield, done it maybe 6 times in my life, back in the day. I used to use what ever they had in stock at the local auto parts.

Re: what size FRONT glass sealant tape for my 70 challenger? [Re: ph23vo] #2919965
05/08/21 12:15 PM
05/08/21 12:15 PM
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Looking for a way out of Middl...
IMGTX Offline
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I believe that 3/8 was the OEM size.

i have used both but often have to seal the edge of the glass with a more fluid sealer like this.

Most of those butyl tapes have been sitting on a shelf for years and have dried out. They rarely seal as they should and need a little help.

If you can get the glass & metal primers it helps with adhesion. Harder to find the right kind since many formulated for urethane and I don't feel they work as well as old school primers did back in the day. Maybe that is just me.

sealant.jpg
Re: what size FRONT glass sealant tape for my 70 challenger? [Re: IMGTX] #2920196
05/08/21 10:04 PM
05/08/21 10:04 PM
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Posts: 14,470
renton, Washington
ph23vo Offline OP
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would it just be better to use urethane?

Re: what size FRONT glass sealant tape for my 70 challenger? [Re: ph23vo] #2920421
05/09/21 02:03 PM
05/09/21 02:03 PM
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Atlanta, GA
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mgoblue9798 Offline
super stock
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Atlanta, GA
Just be sure to let the car sit outside for an afternoon in direct sunlight to help it seal.

Re: what size FRONT glass sealant tape for my 70 challenger? [Re: mgoblue9798] #2920434
05/09/21 02:36 PM
05/09/21 02:36 PM
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Posts: 14,470
renton, Washington
ph23vo Offline OP
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ph23vo  Offline OP
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renton, Washington
yes thats in my plan..waiting for some nicer days

Re: what size FRONT glass sealant tape for my 70 challenger? [Re: ph23vo] #2920460
05/09/21 04:00 PM
05/09/21 04:00 PM
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Looking for a way out of Middl...
IMGTX Offline
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Originally Posted by ph23vo
would it just be better to use urethane?


It is my understanding that urethane degrades in direct sunlight, hence the blacked out edges on all window glass today. I could be wrong but that is what I heard.

If that's true then the Butyl tape is better for our old cars.

If not then urethane would work fine but I don't have the finesse to use the application gun very well. For you it may not be a problem.


If you do the butyl tape and it doesn't go in correct do not try to reposition it. Cut it out and redo it. I had a friend help me and busted a windshield. It went in a little off and before I could say don't he tried to press it back out and snap.

Re: what size FRONT glass sealant tape for my 70 challenger? [Re: IMGTX] #2925595
05/22/21 05:34 PM
05/22/21 05:34 PM
Joined: Jan 2003
Posts: 14,470
renton, Washington
ph23vo Offline OP
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renton, Washington
its 3/8...glass is in now and its perfect







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