I think they make a silicone spray for vehicle weatherstripping, go to your
auto parts store and ask.
Also one warning - call your local police non-emergency number and ask them
what the max allowable tints are in your area, they usually have a few tint
cops will take out sometimes when they get in the mood for writing tickets.
auto glass places have tint meters too, but may not know or tell you what
actual laws are in your area.
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