I know that I need to use some 3M 8509 sealer when I install my new gaskets. My question is, where do I need it, between glass and rubber, rubber and pinch weld, or both? If between rubber and pinch weld, how will I keep from dragging it in the car on my dash and new headliner when I pull the rope outta the seal? Or do I just lift the gasket after the glass is in and squirt some between the gasket and metal? And does the back glass need the sealer as well? I've put glass in before, but never used any sealer and didn't have any problems with leaks, so using sealer is new to me.
If its clean, and you dug out the old sealer if there was any, I wouldn't use any. I don't use sealer if i can get the channels cleaned out to my liking. I do brush the bare spots with the pinch weld primer, But that is all i use. Be sure the drain holes at the bottom are not stopped up as these can cause a leak from behind the rubber.
Bobby; I just had a new gasket installed on my backlight, and the guy put the sealer in after the glass was roped in. If the gasket is plyable, it should go in ok. Just be sure to keep a single edged blade and some glass cleaner handy to get the stuff off after you are done, and don't use too much. Mine is ok, but a little much on the bottom, but not enough for me to do it over again. Good luck!
Before you put the glass in the gasket.Sealer(Just a thin bead) between the glass and the seal is recommended if you are useing a new replacement windshield.(sometimes they are not as thick as the original glass) After the window glass/seal is installed in the car. Sealer between the outer gasket contact surface and the pinch weld is a must (its an uneven surface) some get away without it. I personally use sealer in both areas when I do em. (added insurance IMHO) against leaks.
Thanks guys! Like I said, I've never used sealer before on any of the glass I've installed before so I wasn't sure. Got the tube of sealer today, now just have to pick up some glue for the headliner. Can't decide if I want to do the headliner first or repaint first. Thinking paint first, that way I won't get paint on my new gaskets if I miss a spot masking. Either way, got 7 Saturdays and maybe a few Fridays thrown in to git-er-done!
Just don't used windshield urethane, rubber gaskets are suppose to be able to flex, with urethane, they can't.
Bobby, I would definitely paint first before the headliner. Make sure you glass channel is nice and clean before painting. It will make your headliner install go better and will also make a better seal for the glass.
Dave, the 3M 8509 is not urethane, it's the sealer designed for glass with rubber gaskets. I did my research! I think that's the way I'm going Ray. For sure I want it to seal, as it has always leaked since I've had the car due to the cracked, broken gaskets. If the temps drop a bit in the next couple of weeks I can get more paint on it. Wish I had a climate controlled spray booth, but us shadetree guys have to make due with what ever weather we have!
Good info, im having my glass installed they offer a life time warrany.. But armed with the know how I learn from this site,at least I'll know if the guy is doing it right...lol
