How do I attach closet flange spacer over old flange
I recently installed a new tile floor in my bathroom, and in doing so, raised the level of the floor. I went out and purchased a closet flange spacer kit and it came with the spacer and two rubber gaskets. I need to know how to attaché these. So I put the first gasket on, then the spacer, then do I screw these to the floor, or do I just run the new carriage bolts through the holes in both the gaskets and attach the toilet. Or do I attach spacer to old flange with silicone thanks.