So I put the tape on 5 minutes ago. Seems to be holding up well. The reason I decided to try this product is because my aquarium is right next to the window and when the sun shines on it the water gets too hot for the fish. So we'll see how it keeps heat. One downside that comes to mind is that when you peel off the plastic backing, the film starts to curl and is almost difficult to work with. I've found that removing the back head quickly instead of slowly helps a lot. There will be an update soon.
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