Big ups to Lifehacker for helping publicize this idea, and to user Mopic5 over at AudioKarma for the original post. It”s fascinating to thin that someone along the line figured out that it was a good idea to put something so foreign and crazy on something you normally want to take very careful care of. But the basic principle is that:
In short wood glue and the material LP albums are so chemically similar that the wood glue can’t bind to the record. It can however bind to everything else on the record which includes oil, dust, dirt, fungus, the crayon your nephew rubbed on it, and so on. You’re essentially giving your record a spa wax and ripping all the impurities off of it with the glue.
The original forum post is here, with more details.