Yellow glue. Titebond is the best. Have some reservations about that type push block for a router. I am a bit confused on how you plan on using it.
Now you probably just have that bit in there for photo so having a bearing on it not big deal. But with a router you always want to run your piece past the bit. You do not want to back up a push block in fear of it grabbing and throwing it. I use the same type push blocks I use on a table saw if the piece warrants it. Other wise a push block like the one used on a jointer is only needed. You need to push downward on the material as well as push into the fence if using a fence.
I make this push sticks in all thicknesses and lengths and so easy to make I do them in bunches. When they get cut up I slice the bottom off and start again. It has a hook on the back to that pressure is put both downward and from the back. Finger holes are out of the way. Unless I am missing your intentions I would rethink that.