Window gasket shrinkage

Sorry for the delay reply. Everything is okay and thanks for the responses

After it shrinks enough, it may pull out of the corners and start to leak. Replacement is not an inexpensive operation as the rubber extrusions cost from $2 to $8 per foot and there are a lot of feet of gasket around each window. Just did mine earlier this year as developed a leak in one of the non-opening windows on the passenger's side of the front. It took 3 different types of gasket and about $350 to replace them all. Nice side benefit. I did not realize how much air leakage there was around some of the windows. Had some annoying wind noise go away and it is more comfortable sitting near the windows in extreme weather

Not sure what gaskets you mean, but if you are talking about the rubber trim, that fits in the slot on exterior window frames, it will only be temporary to stretch refit it. It is best to replace it, or you can just add a piece, after shrinking it even more. I think the manufacturer stretch fits it, just to save a few bucks per unit.

Jerry