Read Thread: What do you use to mount a stamp?
What do you use to mount a stamp?
I assume this is all accomplished with the consent of the stamp
I agree with Kirbert, if your wood warps it’s the wrong kind of wood. I have a sheet of some thin pressboard that works great. Doublesided tape insures even pressings.
I use contact cement (the stuff used for laying tile flooring), it stinks, but is really permanent, and I've never had problems with it coming apart, and I always have some around the house.