No, I didn’t use anything. Just pushed the mat into the fondant. Mat didn’t stick or get stuck upon pulling off. I would wait until your fondant has set up firm, but not rock hard. Too soft and the stamp will stick. I found it very easy to do. Here’s the cake I did with the stamp/mat.
Creativity is God's gift to us. Using our creativity is our gift back to God. Clarky's Cakes 😎