Just some guy
Join Date: Jun 2001
Location: SC foothills, USA
Re: Best way to remove urethane windshield sealant?
Are you removing the windshield or or just the leftovers after removing it?
If the windshield, I use a combination of disposable razor knives (NOT utility knives) and windshield wire which is basically "G" guitar string.
After the windshield is out and you are ready to put in another one, DO NOT remove all the urethane. Instead take a fresh razor knife and just level it down so it's as smooth and level as practical. New sealer adheres best to a little leftover sealant. This isn't just me saying this, it's a know fact. Seems like I saw mention of it on a tube of 3M sealant too. Urethane doesn't bond well to car paint. Car makers put a black "primer" where the sealant goes to help with adhesion. Extreme efforts to remove all traces of old sealant will also remove that primer. Bad.
If you've done all that and are after the goop that got around while installing the glass then you better make fast with some "3M adhesive remover" and a bunch of paper towels. Wipe, wipe, grab another towel. Repeat as needed. Cheaping out on the towels makes smears. Speed is of the essence, that stuff SUCKS to clean up after it's set. Lacking the 3M good stuff, acetone, paint thinner or whatever you have that you hope won't hurt your paint is worth a try. Gasoline maybe?
.... it wouldn't be the first time reality took theory and conjecture out behind the woodshed and gave them a good thrashing.