Originally Posted by RichP
If the adhesive isnt thermally active, then how did boiling them assist them coming apart? I cant imagine the adhesive to be water soluble, or is it?
The adhesive does not have to be water soluble. The boiling water temp is enough to make it soft without melting the hard plastic.
I actually saw another DIY elsewhere that discussed placing a plastic light unit (minus the electronics) in an oven at around 300 to 350 degrees for a specified period of time. This allowed the glue to get tacky enough to separate the adhered surfaces.
As you can see in long's pics, the proof is in the pudding (or in the soup pot).