Ok it has been a while since I installed a windshield. I picked up the 3M Butyl tape and tried to use the 3M 08643 I had on a shelf for years. It was dried up. I went to get some more and apparently they no longer make it?? They only carry a primer made for urethane windshield setting up. I asked if it could be used with the butyl tape and nobody seamed sure?? I called a buddy who has a shop and said to install without the primer on the gl*** as the new stuff might not set right?? My windshield pinch weld is just redone from bare metal to epoxy primer. Is it necessary to use the primer on the gl***???? I am thinking there is no UV issues as it is covered with the chrome moldings and the adhesion would only be as good as the grip between the primer and the gl***? I think the tape butyl would actually create a better grip to the gl***??? IDEAS???? What is everybody using?
Back when I was in the gl*** business (70's-80's), we just cleaned the gl*** and ran the butyl tape around it. There was an aftermarket primer we brushed on the pinchweld to help the tape stick better. Sommer and Maca was one supplier. C.L. Lawrence was another. Most gl*** shops probably deal with them. Good luck.
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