I have five one gallon containers of porch and floor paint that are 6 years old and have never been opened. They are BEHR Premium Plus Porch & Floor, medium base acrylic latex, interior/exterior low lustre enamel. This paint can be used on the basement floor (which I never got around to doing). The colour is called GATHERING PLACE. Original price about $250 incl. tax. Moving and unable to use. Home Depot says it is still ok.
See colour at https:www.behr.com/consumer_