Paint, Trim & Chrome > Trim & Chrome

how thick should the windshield butyl be?

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kcombs:
I am installing an aftermarket windshield (with tinting on top) and need to know if I should use 5/16" or 3/8" butyl (sp?). I seem to remember a post that said to use 5/16" with OEM windshields and 3/8" with aftermarket, because they are thinner. I really don't want to replace the windshield a second time because the trim will not fit.

Jim:
Hi ,I'm replacing a windshield. Also what did you end up using ? .Jim

gs spoken here:
That is what I thought, 5/16 factory and 3/8 for after market glass. I had 2 windshields replaced by my local glass man, one in a 68 and the other in a 70 GS, he said he used 3/8, not sure if it was 3m, and with the old clips all the trim fit. Loren and I tried to set the rear window in my 66 with 3/8 and the trim would not install. We have the correct clips, but new, and had to remove the butyl and start over. I bought a 1/4 and5/16 3M kits and have not tried to install it the second time. I was told the 3M does not compress much. Wonder if there is any tricks to get it compressed? Like setting in the sun, or heat the butyl or use a roller on the butyl before you remove the paper? I think I am over thinking this. Also 66/7 hardtop rear window trim can be problem to install and the new clips may add to the problem.

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