Where can I get that adhesive?

The LG G2 has this wonderful rubber adhesive holding the screen on. It's far superior to the stuff I buy and use from eBay and everywhere else, but I can't find it to buy it. Anyone know what it is called or where to get it? It is really flexible and sticky. I can even reuse it often when I do screen replacements on the G2. Thank you for any help you can offer!