We use it all the time at work running 120psi air, hot water up to 90 degrees and cold water, plenty of constant movement, never have trouble with it, used it in my last two camper builds without trouble. As Keith said use either a sharp box cutter or get a proper cutter for it, you can get cheap ones that are about the size of a matchbox, which is what I use because you can get them into tight places
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