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It was my understanding that most Coroplast is Polypropylene not Polyethylene. The is corugated PVC . Coroplast used for signs is treated (Corona Flashed) to accept sign inks which compound the adhesion process It can be removed by using a propane torch with a flame spreader the strongest bonds are with low melt glue stick guns as the sticks are polypropylene.. 3m Dp-8005 is perfect but expensive. Another technique is stitching with zip ties or pop rivets with washers.
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