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Kirkham Motorsports

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Old 09-07-2019, 04:03 PM
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Default Cobra Valley Windscreen Install

Removed my old cracked windscreen from the frame and am ready to install the new poly one. Anyone have any tips on the install? Afraid to make a huge mess with the Permatex

Thanks in advance
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Old 09-07-2019, 08:31 PM
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You should use windshield butyl tape. It is the correct product and makes no mess. Permatex is not the correct stuff.

I think you need 2" wide and the trim away the excess.

John
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Old 09-08-2019, 04:53 PM
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The recommended glue that I used was sure nasty. It was as bad as Neverseize for getting a drop on one finger and then it gets to your other elbow. If I ever do it again, I'll use the butyl tape.
Other than the glue, I've very pleased with the polyglass windshield.
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Old 09-09-2019, 12:26 PM
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Quote:
Originally Posted by Grubby View Post
You should use windshield butyl tape. It is the correct product and makes no mess. Permatex is not the correct stuff.

I think you need 2" wide and the trim away the excess.

John

What thickness/length 2-inch butyl tape did you use?

Thanks in advance.
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Old 09-09-2019, 02:28 PM
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Grubby, I (mistakenly) went with the glue at the recommendation of Cobra Valley, who sold me the windshield...and the glue...

My Bad.
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Old 09-09-2019, 04:49 PM
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I got the windshield and tape from HanesHotRods

It seems like it was 1/16, but the guys at Hanes can tell you for sure and sell it to you.

The install is very easy.

John
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Old 09-10-2019, 11:07 AM
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Thanks for all the replies
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Old 09-11-2019, 10:58 AM
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The Silicone ADHESIVE that comes with the Polyglass is not just a simple silicone 'sealant' or gasket sealer. Using typical windshield Polyurethane or Butyl will not adhere well to this particular windshield's coating. This particular adhesive (made by Permatex) will NOT work well for other plastic or glass windshields either. Just the PolyGlass due to it's special coating.

Cobra windshield frames are not as sturdy without rigid glass supporting them. By gluing the PolyGlass into the frame, makes it into a ‘one piece unit’ that’s much stronger and more sturdy as well as preventing the pull of a soft top from pulling the frame away from the windshield. The recommended adhesive is made to adhere to the special super slippery silicone windshield coating used on this product, where others will not.

Even if you have a center rod support, it would be best to use adhesive to seal the PolyGlass in place, resulting in an overall more rigid windshield & frame assembly reducing deflection or buffeting even if not using a soft top. Just someone heavily leaning on the windshield could bend the frame where otherwise it would break the glass. Making it all 'one piece' makes the entire frame stronger.

While you 'can' omit the adhesive, you benefit from a better overall result using it. These tips and hints are shown on the webpage as well as others...

http://performanceunlimited.com/cobr...indshield.html

Last edited by Randall Thomas; 09-11-2019 at 12:22 PM..
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Old 09-11-2019, 01:45 PM
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I have a suggestion. When you install the windshield into the frame, replace the brass strips for the wind wing attachments with stainless. I had the windshield installed, then the brass stripped out, now I am installing helicoils to hold the wind wings in place.
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