Welcome back!

My tile department at Lowes has a general tile and grout sealer. Though honestly, my kitchen is tiled. The grout is a dark gray. Even with greasy things dropped on it, I don't have stains and have never sealed it. It's 7 years old now, looks great. (After I sweep and mop it, of course LOL)

It's possible you were looking in the paint department at your store? The tile department would probably have what you're looking for.

I like Dupont grout sealer that I buy at Lowes in a quart-size grey square container. I apply it with a spray bottle and pour the excess back in the container and rinse my spray bottle really well.

Thanks silvamae that is kinda what I have been thinking . I have wider grout lines in some places so it is going to take more than a quart .