X-Protector Water Based Grout Marker - 2 PCS with 8 Tips, Black

Works amazing!! I hated my tile floor until I found these pens and used it on the grout. It looks great. I put on the smallest amount and blended it in with a damp cloth or my finger.

Easy to use, time-saving, effective results, water repellent, shipped fast, and reasonably priced.

Dark gray was a good match for my travertine slate looking tiles. The pens don’t cover a lot of space but they work well.

I honestly don't see the point, since it's made to be used on unsealed grout, that is, when the grout has just been applied. Who's going to use a pen like this to paint all the grout in a shower? It would take too long, and the effect isn't aesthetically pleasing. Maybe I did it wrong, I don't know, but it doesn't look good! In my case, the grout in my shower is sealed, since we are talking about grout that is already many years old. I tried this pen but I don't like the effect. I don't know if I should have applied adhesive tape, which makes no sense, since if that's the case, I would prefer to use another type of paint, not a pencil. I am also concerned that the paint will not adhere properly, since, as I said, the grout is sealed, and this pen is designed to be applied to unsealed grout.

Light gray was not light enough. But that is not the fault of the grout sticks. I’m going to give gray to a neighbor, it matches her bathroom perfectly. Will order white now to get the job done!

Horrible

You get what you were expecting. It works great.

The grout pens help with accurate lines with just the right amount of grout.