3 oz. Extra Catalyst for use with specific Basic Coatings products. Basic Coatings’ StreetShoe® and Hydroline® Plus Wood Floor Finishes have a pot life of 24 hours. After  that, the catalyst slowly becomes less effective because it reacts with the water in the system. Re-dosing or  re-catalyzing unused portions of finish after 24 hours restores the mar and chemical resistance properties of  the dried film.