i dont do no where near the amount of T&G cleaning as some of you other folks do but i can say,
the easy seal from cleancraft is definately a sealer, and yes, the glossy finish does fade after a while.
its a good product as far as i can tell but then again, other then stuff i used to seal my own grout, i never used any other sealer, so its difficult for me to compare.
i used the sealer on 2 jobs. one i sealed an hour after i cleaned, the other the day after i cleaned.
the one the day after, seemed to absorb more sealer so i'd have to say its much better to be sure its totally totally dry before application, as joe mc said.
or go the route mike c suggested with that magic wand stuff.