I know nothing other than the instructions saying it wasn’t bi directional and should be installed on the inside.
Of course it could just be to avoid people installing it outside and then it getting wrecked in 10 mins.
Yeah they probably know better than me which side is optimal, but either way you should get 95% of the performance on either side of the window (until it peels off I suppose)
@frankenbike started
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I know nothing other than the instructions saying it wasn’t bi directional and should be installed on the inside.
Of course it could just be to avoid people installing it outside and then it getting wrecked in 10 mins.