I know - I saw your advice about that on another thread. I’ve been working hard to find the Goldilocks distance. It seems though that if I back up enough to not blow out the plastic it doesn’t do anything. One thing I am wondering about is that I am using “Biolefin” - which is more biodegradable than regular plastic. When you put the heat gun to it, it shrinks in a sort of honeycomb pattern. I think this stuff is more sensitive - I’ve used regular plastic and not had this happen, but I was trying to use something that was slightly more sustainable. Keep meaning to research this issue.Back the gun up.... most likely, you're too close.
I do that too and it does help. Usually it’s the face of the bar that I blow out.I’ve found that I ruin less wraps if I stack a few bars and heat the sides first from a safe distance (what that distance is seems to change with every swipe of the heat gun!) then un-stack and hit the top and bottom gently to tighten. I don’t blow out as many seams that way. Maybe they have a chance to cool and strengthen and the stack more evenly distributes the heat!?!?! Who knows but it works for me.
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