They have an option to get the 3M backing, but I plan on using no adhesive. I hope to use some cork tiles to build a support on top of the stock aluminum bed. Then the silicone pad, glass on top of that, and finally some clips to hold it all together. I may use some spray adhesive to hold the cork tiles together, but that is it. We will see how it works. I have no direct experience with it, but some swear by it.
BTW, there is a picture of the silicone bed in this post.