C1 windshield glass thickness

[Thomas H.]

Re: C1 windshield glass thickness

Tom, Rich
I just picked up a Pilkington made glass for my 62, tinted and it measures between ,230 and .238, this with a good caliper, measured my old windshield and it was actually between .260 and .270. Pilkington is a division of LOF, I talked to them and they said "good luck finding one the original thickness". They also told me that a lot of the early replacements were thicker than the original. Under $200 and no shipping charges thru my local glass dealer.

Terry

Good deal. Don't forget to use one of the newer, shorter, windshield gaskets when you put it all back together.

Tom

[Rod K.]

Re: C1 windshield glass thickness

No particular interest except I'm about to put mine back together with a replacement glass and curious if it's thick enough to fit the seal properly. I don't have the original (broken in a 1964 accident) and can't get to the new replacement yet to measure. The circa 1965 replacement measures .290 near the center of the top edge, all I can access right now. Thanks for all the input, I now have at least a ballpark number to look for on the new glass.

[Richard M.]

Re: C1 windshield glass thickness

No particular interest except I'm about to put mine back together with a replacement glass and curious if it's thick enough to fit the seal properly. I don't have the original (broken in a 1964 accident) and can't get to the new replacement yet to measure. The circa 1965 replacement measures .290 near the center of the top edge, all I can access right now. Thanks for all the input, I now have at least a ballpark number to look for on the new glass.

Rod, If your replacement is from Auto City Glass, it'll be fine. I've used theirs several times lately and although it's a tad thinner than the original glass it's not a problem. In fact it actually helps, as being a few thousands thinner it's easier to get the lower and upper channels as well as the side posts installed. After I install the rubber to the glass and centered, I tape the rubber to the glass every 6" or so, then apply a moderate bead of sealer to the outside edge of the glass to rubber joint, deep down to keep away from the visible area, removing and resetting the tape as I apply it. I let it kick-off for a while to let it cure and stick to the glass. Then assembly starts. Use extra caution at the curved ends.

Not sure if you have the repair doc I wrote so I attached it below. Also HTML files HERE.

Good deal. Don't forget to use one of the newer, shorter, windshield gaskets when you put it all back together.
Tom

Yes good catch Tom......

Last year around this time Tom and I were battling rubber wrinkles and we teamed up with the vendor, CRC who makes them.

Prior to a year ago, there were 2 sizes or the rubber...... There was a very tight version which they sold for years and they got complaints from people that were breaking glass at the outer curves as it was too tight. Then they made a new longer version to avoid breakage, but it was way too long, 8" too long, and although people were no longer breaking glass, it left ugly wrinkles on the dash inner curved areas.

So there was Papa Bear and Mama Bear. (sorry, I get a little silly in the early morning hours I've been up since 4am in the shop) But we needed a Baby Bear version.

So Tom and I tag-teamed Mike at Corvette Rubber(the supplier), and he was a great vendor to work with. He made a new shorter, in between Papa and Mama bear size rubber seal and came up with the perfect offspring........A new Baby Bear size. He sent Tom and I each test trial samples and it was a perfect fit. We both had glass waiting and the result was fine.

Around that time if you bought the CRC seal or if bought sometime before, it may be the tight or the loose rubber. If you bought it after that it's probably okay.

here's the full history.....

https://www.forums.ncrs.org/showthre...Gasket-Overlap

and
https://www.forums.ncrs.org/showthre...367#post688367

Rich

[Rod K.]

Re: C1 windshield glass thickness

Thanks, Rich,

I do have your rebuilding article, as usual very well done. I believe my new glass is from Auto City. I got it a few years ago at a swap meet and put it away along with the old replacement which is delaminating near the edges.

I also recall the thread concerning the gasket length as I followed it as you developed the new dimensions. My gasket is much older (I have purchased parts over the years as I identified the need, not AS I needed the parts), so I may have to get one of the new ones. Have to check the one I have.

What gasket-to-glass sealer do you use? I believe Mike McCagh mentioned a urethane sealer some time back, but I'll have to dig through my notes to find it. Thanks again for all the help you provide to us part time restorers.

[Richard M.]

Re: C1 windshield glass thickness

If the glass seal is really old don't use it. It'll be too tight and may break at the lower corner joints.....it happened to me with a NOS rubber seal once. 3 days later it split at the butt joint. Not happy.

For the sealer, probably similar to Mikey's product...... I use a NAPA product, but in a small hand-size tube which is easier to use than a big gun cartridge.

NAPA 4121

Good Luck,
Rich

[Terry D.]

Re: C1 windshield glass thickness

Richard

Will one tube do the windshield?

Terry

[Richard M.]

Re: C1 windshield glass thickness

Richard

Will one tube do the windshield?

Terry

You don't need much. I've done half a dozen windshields with one tube. Use it sparingly and accurately. Too much makes a awful mess and can cause the rubber to slip off of the glass.

Rich