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Old 12-12-2008, 07:00 PM
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Urethane application to set windows.

Now that I have found it is so easy to post videos I thought I would post another.

This is a subject that comes up often, urethane setting front and back glass. This is not for the weak knees, setting a window in urethane has a VERY steep learning curve.

The videos you will see are of a glass man beading out the urethane ready for a window. You will notice by the videos and the photo below that the urethane is not a "rope" looking bead. It is a pyramid shape, this is so as the glass is set down on it, the bead gets fatter and fatter on the glass as it is pressed onto it. What this does is eliminate any air pockets as you would likely get if it was just a fat bead.

So, the tip on the urethane tube has a V cut into it with a razor blade to allow for this bead.

The guy is using a battery powered gun, very slick. Sorry for the big photo, I forgot my work camera is set on larger photos. And also sorry for the poor quality video, I wasn't ready for the guy, he is so damn fast!


Brian






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Old 12-13-2008, 05:43 AM
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Thanks! the v cut in the tip is a great trick

What brand was his caulk gun?

On my 65 mustang project i would like to urethane set the glass and trim as a late model, If it is possible without a custom glass.
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Old 12-13-2008, 06:33 AM
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nice work , i can't even put caulk around a house window or door with out makeing a mess..........lol
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Old 12-13-2008, 09:10 AM
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Very timely posting as I just had the front windshield on my wife's 2008 Nissan Altima replaced yesterday. The guy came to our house (The Glass Doctor), it was the same guy who replaced the windshield in our 2004 Tahoe almost a year ago when a buzzard tried to come through it. I watched him the whole time he worked, he didn't seem to mind as he was really interested in my 34. When he was ready to place the windshield on the freshly applied urethane I asked him if he needed any help. He laughed and said "just step back" grabbed the windshield and placed it perfectly by himself. This guy made it look so easy, of course he said he had 20+ years experience.

Vince
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Old 12-13-2008, 09:58 AM
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By the way, someone pointed out to me something I should have mentioned but frankly was embarrassed about. This window is being set on a newly painted pinchweld. That is a BIG NO-NO. You are NEVER to set a urethane window on a repaint, the OEM paint, or EPOXY primer over bare metal is IT, PERIOD. We were doing the epoxy primer thing, it just hit me that apparently things have got a little lax around here. I will be talking to the shop manager about it monday.

There is NO EXCUSE for not doing it properly over epoxy primer (that is on the bare metal) or OEM paint.
I don't know the brand of the gun but I will find out.

Brian
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Old 12-13-2008, 06:13 PM
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It appears to me the area where the urethane adhesive is being applied is black, no the top coat color of blue. If that black is epoxy primer or the oem primer I see no problem.
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Old 12-13-2008, 06:18 PM
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The black you are seeing is a "pinch weld primer" that was applied by a brush by the glassman. At least that is what it looks like to me. I didn't examine the pinch weld after paint and don't remember exactly what I saw. But I think the pinch weld was painted.

Brian
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Old 12-14-2008, 06:26 AM
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I was noticing the light whitish (sp) area between the black and the blue which appears to me to indicate that thee topcoat was removed?
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Old 12-14-2008, 09:56 AM
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I think that is just a glare or something, I didn't see it happen so I can't say without a doubt it wasn't, but I seriously doubt it, that isn't how these guys work.

Brian
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