Fel Pro thermostat gaskets?

I always do. I glue the gasket to the t stat housing usually with Indian Head gasket shellac but not the intake. SOme use 3M weatherstrip adhesive. That's a little harder to get off next time. The reasons why I seal to the thermostat housing, #1 The intake surface is machined and the tstat housing isn't. #2 You can take the tstat housing off the hose and clean the gasket off with the wire wheel. Scrape off what you can.