Hey, all.  My tiling guy recommended that I seal my grout, and he suggested a spray on sealer that evaporates from the tile (so that I don't need to wipe it right off).  He said that Home Depot and Lowes carry some, but he couldn't remember the brand.
I found one called 
Tileguard® One Step Grout Sealer at Ace Hardware online.
Has anyone used that, or a similar product?  If so, did it work well for you?
Thanks!
Adam