Test, test, test. Stick in the freezer overnight and then test again. Stick in a bucket of water overnight and test again... I love hot glue but it doesn't work well on everything. Nodes are silicone. Hot glue does not stick to them well. Actually, I think the only things that sticks well to silicone is silicone adhesive. Not even superglue. Hot glue might stick to the cover and be good "enough" to help hold the cover on.
Hot glue tolerates cold and wet, but too much of it and it gives. Learned this the hard way last year. And from what I am being told this winter shall be similar. I am preparing accordingly. All exposed modules in my elements will be glued AND screwed.
