At first I bought 3m duct tape to hang 20”x30” posters up in the classroom. After a couple days, posters peeled off like clockwork. I tried masking tape and gave up until I bought gorilla duct tape in silver. At school the next door teacher told me they use a non-stick glossy paint on the walls. Well, I hung up my posters with 4-6 pieces of rolled pieces of gorilla tape. It’s been about 3 weeks and so far, maybe one poster corner peeled off out of 6 posters. I am crossing my fingers that the tape will last. The roll seems like it’s thicker and the glue more even than the 3m type. It cuts nicely with good pair of scissors and tears nicely.Next, I am going to try to duct tape my camp chair bag that is ripping at the seams.
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