glass pinchwelds
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Our paint shop has been instructed by the sikkens rep to not refinish urethaned glass pinchwelds. They are left bare metal then we just use 3m pinchweld primer and urethane. He says there is a liability issue if the flange is painted which i suppose means the paint could pull from the panel causing the window to come out. Is anybody else doing this way? Im not real confident in the corrosion protection given from using just the window primer. He also claims that you can just use an etch pen on bare metal under seam sealer which sounds fishy to me too but he swears this is ok. What are your guys thoughts?
sounds like sikkins has alota confidence in the adhesion of their products:lol: 😆 😆 😆 thats nuts:woohoo: :woohoo:
my glass guy says its ok to prime the pinch weld but he doesnt want paint on them. not sure why as all oe apllications are done on top of paint
We paint ours, I’ve never heard of that before….not to say its wrong, but it seems odd.
Sikkens…eh? I’m pretty sure you’re meaning “Sika”?
I’m pretty sure you are…
He is correct, the windshield pinchweld primer is far superior to anything you have. It is designed to work between metal and urethane, preferably no paint.
Therefore, best adhesion would be no paint, or at least scuffed paint…
So unless you’re sanding the pinchwelds well after painting, best to just mask them and leave them!
I have personally seen OE installations fail due to bad paint adhesion… And even more after-market paint failures…
Urethane bonded to paint only has the strength of paint.
Urethane bonded to metal has the strength of metal. Almost.
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