Just installed a new built up floor in the bath room. Now toilet flange is too low to get a tight seal even with with a thicker wax ring. New floor is about 7/8" above old flange while ring sets about 1/4" into receased bottom of toilet. Need a solution. Use a 2nd wax ring? Flange extender(s)? What types of sealants or gaskets would I need? Thanks.

the hardware should carry a built up neck piece for that, i know they use them on handicap toilets, good luck