 Windshield install with butyl - is butyl primer needed? |
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| Kansas 914 |
 Jun 23 2017, 07:41 AM
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#1
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Advanced Member  Group: Members Posts: 2,999 Joined: 1-March 03 From: Durango, Colorado Member No.: 373 Region Association: Rocky Mountains 
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I have brand new paint on the car. I remember the last time I had a windshield installed by I don't think the installer used primer.
Is it best to prime the frame first and is butyl primer the right stuff? Like this? https://www.amazon.com/CRL-Pinchweld-Primer...uct_top?ie=UTF8 |
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| lierofox |
Feb 11 2020, 08:32 PM
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#2
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Member Group: Members Posts: 256 Joined: 23-June 15 From: Paso Robles, CA Member No.: 18,880 Region Association: Southern California
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https://www.amazon.com/gp/product/B00473W5V...=UTF8&psc=1
I used this stuff to primer my windshield and frame. Buddy of mine was the son of an auto glass guy so he helped with installing dozens of them over the years. Primer every time or it'll eventually begin to leak. I think he mentioned that it also helps provide a bit of extra protection to the butyl since it helps to mask the sunlight, in addition to the glass blocking the UV. From what I understand, modern urethane adhesives, when they grab on, hold on WAY too well and the windshield becomes a structural/shear member of the car, and all the flex ends up being transferred into the windshield glass, which the 914 windshields were never designed to be used for, causing them to crack. |
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| stevegm |
Feb 11 2020, 09:10 PM
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#3
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Advanced Member Group: Members Posts: 2,111 Joined: 14-July 14 From: North Carolina Member No.: 17,633 Region Association: South East States
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QUOTE(lierofox @ Feb 11 2020, 09:32 PM)  https://www.amazon.com/gp/product/B00473W5V...=UTF8&psc=1 I used this stuff to primer my windshield and frame. Buddy of mine was the son of an auto glass guy so he helped with installing dozens of them over the years. Primer every time or it'll eventually begin to leak. I think he mentioned that it also helps provide a bit of extra protection to the butyl since it helps to mask the sunlight, in addition to the glass blocking the UV. From what I understand, modern urethane adhesives, when they grab on, hold on WAY too well and the windshield becomes a structural/shear member of the car, and all the flex ends up being transferred into the windshield glass, which the 914 windshields were never designed to be used for, causing them to crack. So you just put the primer on the windshield channel on the car where the butyl touches? As well as on the windshield? |
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Posts in this topic
Kansas 914 Windshield install with butyl - is butyl primer needed? Jun 23 2017, 07:41 AM
76-914 I did not use any however I did prep with Lacquer ... Jun 23 2017, 07:48 AM Mark Henry What size is the correct butyl...it's the tape... Jun 23 2017, 08:00 AM
mepstein
What size is the correct butyl...it's the tap... Jun 23 2017, 08:07 AM Mark Henry
What size is the correct butyl...it's the ta... Jun 23 2017, 08:09 AM Kansas 914
[quote name='Mark Henry' post='2499469' date='Jun... Jun 23 2017, 08:11 AM Dave_Darling Using the primer is not necessary, but it does hel... Jun 23 2017, 09:24 AM Perry Kiehl Butyl primer will improve the seal. For $17 ... Jun 23 2017, 09:35 AM Kansas 914
Butyl primer will improve the seal. For $17... Jun 23 2017, 10:45 AM Mikey914 no primer required
New paint not needed for sure.... Jun 23 2017, 02:39 PM bbrock With luck, I'll be facing this task in the not... Jun 23 2017, 05:58 PM Dave_Darling Other than originality, are there reasons to stick... Jun 23 2017, 10:07 PM bbrock
Other than originality, are there reasons to stic... Jun 23 2017, 10:49 PM porschetub
Other than originality, are there reasons to stic... Feb 12 2020, 01:04 PM Perry Kiehl Butyl tape is a consistent thickness, in this case... Jun 23 2017, 09:10 PM Montreal914 For the rear window, I have used 5/16 butyl about ... Jun 23 2017, 09:45 PM stevegm 914rubber’s kit is 9.5 mm, which is 3/8”.
I h... Feb 11 2020, 07:22 PM bbrock
914rubber’s kit is 9.5 mm, which is 3/8”.
I ... Feb 11 2020, 08:55 PM stevegm
914rubber’s kit is 9.5 mm, which is 3/8”.
I... Feb 11 2020, 09:11 PM bbrock
[quote name='bbrock' post='2785159' date='Feb 11 ... Feb 11 2020, 09:36 PM stevegm
[quote name='stevegm' post='2785165' date='Feb 11... Feb 11 2020, 09:55 PM 914werke
Other than originality, are there reasons to stic... Feb 11 2020, 08:18 PM ConeDodger I did this alone but another set of hands would be... Feb 11 2020, 08:30 PM lierofox
So you just put the primer on the windshield chan... Feb 12 2020, 01:06 PM mepstein The warmer the better. Mark / Mikey explained the ... Feb 12 2020, 01:20 PM |
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