I took one out of the box at Home Depot...had two thin rubber sealing fins and an in-set seal for the bottom of the toilet..it felt like it would fit very well as i test fit it into PVC..didn't put it all the way in..didn't think id get it out easily...seems like a very clean alternative..Any opinions about waxless?..I'm going to install a new toilet in my new upstairs bathroom next week..Dare I trust it to waxless?...Don