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So random question, and had no idea where to post this but…

I’ve seen some window tinting companies also make claims that their window tints also keep the car warmer in the winter because INFRARED RAYS Go both ways. So the heat it blocks out from the sun coming in isn’t the only thing the tints do. It also blocks the IR from going out of the car also. I’ve seen some people simply claim that window tints are insulation.

This kind of makes sense, but is it backed up at all? Have any tests been done? Will a car that has window tints stay warmer longer in the cold winter?