yes, they are stiff, and it also depends on which one you used. Heat-n-bond lite is what i have used with raw-edge applique, but I only apply it around the very edge on larger pieces, that way the middle is still soft and pliable. For some reason I have not had much luck with wonder-under. I have done numerous settings and even different irons, I may have had some "old" stuff that didn't stick properly. Just don't use the Heat-n-bond ultra, its not meant to be sewn thru :)