I have found that putting a bit of RTV on the gasket is an easy way to make sure that it seals and that it comes off when the time comes. Ive had good luck with it all around. But as long as the parts are clean and strait, Ive never had a problem with a paper gasket leaking for years. Ive also used RTV on one side and lithium on the other for cork gaskets. Allows you to take off valve covers or inspection plates without destroying the gasket.But this is just my opinion. Im sure every one has their way of doing it that is right or wrong. As i see it though. If it works good and doesn't cause damage. No harm in being a little on the safe side.