Setting a toilet on a wood floor

Going to set a bowl in a late 18th century masterpiece soon. Place is so old I think cast iron hadn’t been invented yet. How obsessive compulsive is it to spray foam the underside of the bowl to prevent condensation/sweating. I’ve also been eyeballing the danco perfect seal gizmo. I’ve always used wax or putty-but this ones for course credit over a wood floor $$$$$. Thought or suggestions are appreciated.