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gbj_tester
@JurekB
I've not tried it but it'd be my guess that hot glue won't adhere to polypropylene or polyethylene.
The only way (IME) to get either of the above to stick together is to use a polyolefin primer which alters the molecular structure of the surface. I successfully used this method and cyanoacrylate to extend my tool tube to being double ended - to increase capacity as well as make it easier to access the contents. It's reasonably heavy (around 700g) and has been bounced down the road on a number of occasions without the bond failing.
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