• Matt_Shatt
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    1 year ago

    It’s not. It’s designed to be inside as a sun reflector. People just use them to block ice formation too but they won’t last as long that way. They weren’t designed to be rained/snowed on and frozen…but they aren’t expensive so does it really matter?

    • Hadriscus
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      1 year ago

      I think it stops ice forming by still being inside, by reflecting light and heating up the windshield, but I could be mistaken.