C.M.
Hi D., My husband and I sealed our grout by ourselves. My husband is a jack of all trades so he like to do things on his own. We bought the sealer at Home Depot and poured it into a kethup bottle, (you know the cheap ones you can buy at the dollar store for picnics) and just went along and sqeezed it on the grout to saturate it. It was easy but time consuming. If you have a lot of tile and four children it just might be worth the money and time to have someone do it for you. Good luck.