It doesn't lay flat at all. Use the included tape. It will not lie flat. So we took our extra wide clear packing tape and applied several layers to the strip, thinking the tape would hold it until the plastic came loose, and then we removed it. nope It freed itself and curled up within minutes. We had to throw it away as we had cut it and couldn't return it so we didn't get our money back. Very dissatisfied with this product.
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