I bought this tape to seal my portable air conditioner hoses and vents. It works amazingly well and is very easy to use. I just peeled the brown backing off the tape and taped it to the parts that hold the tubing to the block and window seam. This tape has been in place for about 3 months due to extreme heat and rain. I haven't had any issues with peeling or loss of tape adhesion. I am very happy.
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