I have seen 303 mentioned a lot and there is another product called Sunguard.
Not sure how a bit of spray could stop UV but I hope 303 does cause that is what I have used.
I do put foil bubble wrap style duct wrap to keep the sun out of my windows and that has worked from the inside.
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2017 SLX 195RB
2021 Jeep Grand Cherokee Summit L 5.7L V8
Andersen WDH hitch, Renogy 100 AH Lithium &
200 Watts solar panels from Renogy
Prev. '14 Jeep Grand Cherokee Overland, gas 3.6 V6
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