Well, too late now. lol I couldn't find anything on the tube that said anything about temperature, so I went ahead and installed it. Here's what I did. Not sure if this makes a difference or not. I basically applied the urethane to the window in my living room and then took it outside and stuck it to my truck and put all the screws back in just seconds after finishing the application of the urethane indoors. So, the urethane was applied to the window at room temperature then the window was installed seconds later. The metal on the truck was still going to be cold of course and it was still cold outside so not sure if what I did helped at all or not. The temp outside was about 28 when I did it. I did it on Monday and it seems to be holding up well. Not sure how I would know if it isn't holding up since it's also screwed in as well. Hopefully I won't have any problems. I don't have access to a garage and I don't know when the temps are going to get above 40 around here. Got tired of driving around with no window. Anyway, thanks for your help guys.

 

Well, I tested out my window to see if it's leak proof and it unfortunately isn't! Some water came in through the top. Do you guys have any suggestions or am I going to have to take this window back off and do this all over again? I guess I either didn't put enough sealant on the frame or the cold weather didn't let it bond properly in some spots. Anyway, any more info would be appreciated. Thanks.

 

You probably did as well as you could under the circumstances. I'd guess that the cold temps prevented a proper bond, so there's no point in trying to reseal it as long as your temps are too low. Either find somewhere you can warm up the vehicle, or tolerate the leak until spring. At least the window is in place...