914 glass butyl, I searched and got confused... Options

[Kansas 914]

I am replacing the front and rear glass in the flared car when it gets back from paint.

I have read where the front windshield should use 3/8" butyl, but then there are warnings that this is a tad thick and if you don't have a warm day to press the glass into the butyl the trim won't click in.

I think 5/16" inch is a better solution. Does anyone have a source for 5/16" butyl? Does it really matter whether the rear glass is 3/8" or 5/16" since there is no trim just interior pieces?

Thanks in advance!

[McMark]

https://www.amazon.com/3M-Windo-Weld-Ribbon...5%2F16+windweld

[ndfrigi]

https://www.amazon.com/3M-Windo-Weld-Ribbon...5%2F16+windweld

McMark,

for the rear glass, I believed 3/8 is the original size but I read from few thread here that it is better to use 5/8? I did mine before with 3/8, but after few months I got water leak again.

[McMark]

https://www.amazon.com/3M-Windo-Weld-Ribbon...5%2F16+windweld

McMark,

for the rear glass, I believed 3/8 is the original size but I read from few thread here that it is better to use 5/8? I did mine before with 3/8, but after few months I got water leak again.

Rear glass is spec'd at 8mm in the factory manual. So use 5/16" on that as well.

Nothing should ever use 5/8" (IMG:style_emoticons/default/unsure.gif)

[ndfrigi]

https://www.amazon.com/3M-Windo-Weld-Ribbon...5%2F16+windweld

McMark,

for the rear glass, I believed 3/8 is the original size but I read from few thread here that it is better to use 5/8? I did mine before with 3/8, but after few months I got water leak again.

Rear glass is spec'd at 8mm in the factory manual. So use 5/16" on that as well.

Nothing should ever use 5/8" (IMG:style_emoticons/default/unsure.gif)

Hi Mike and Mark,

For the windshield, when Rufino (from local here who did several 914 windshield) replaced my windshield, he used the gun type sealer and yes it is around 5/16" thick only that he applied and that is installing back the chrome trim.
Maybe when i did my rear glass, the 3/8 butyl i bought online (1 box) was old and it didn't stick well. I will check later the box of butyl I have or i didn't do a good job pressing it.

[rick 918-S]

https://www.amazon.com/3M-Windo-Weld-Ribbon...5%2F16+windweld

McMark,

for the rear glass, I believed 3/8 is the original size but I read from few thread here that it is better to use 5/8? I did mine before with 3/8, but after few months I got water leak again.

Rear glass is spec'd at 8mm in the factory manual. So use 5/16" on that as well.

Nothing should ever use 5/8" (IMG:style_emoticons/default/unsure.gif)

Hi Mike and Mark,

For the windshield, when Rufino (from local here who did several 914 windshield) replaced my windshield, he used the gun type sealer and yes it is around 5/16" thick only that he applied and that is installing back the chrome trim.
Maybe when i did my rear glass, the 3/8 butyl i bought online (1 box) was old and it didn't stick well. I will check later the box of butyl I have or i didn't do a good job pressing it.

I would never use the urethane gun type sealant on the front windshield. if any of it touches the trim you will have to ruin the trim to remove it. As I understand glass installers have to use it on all installs now by law. So get a friend and do it yourself if you can't get the glass company to install as originally designed.

[Kansas 914]

I would never use the urethane gun type sealant on the front windshield. if any of it touches the trim you will have to ruin the trim to remove it. As I understand glass installers have to use it on all installs now by law. So get a friend and do it yourself if you can't get the glass company to install as originally designed.

It must vary by state. I had a new windshield installed in the Raspberry car a month ago and he used butyl. He said he hadn't used it in many years but if that is what originally came with the car he could do it.