This is one of those products that has a lot of upsides but several downsides. To preface, I have a roughly 20-square-foot white tile floor in my apartment bathroom. When I moved in, the grout was very discolored and made the tile look dirty. I was extremely skeptical about this product, but it was a reasonably priced solution and a top seller on Amazon, so I gave it a shot. I followed the very simple directions on the pen (clean floors, remove cap, shake pen, use), and was initially amazed by the results. My nearly gray tile grout was being transformed back to white. Although, after I got through about 6 square-feet of tile, the pen tip started to fall apart. Was it still usable? Yes. Did it hinder the quality of the paint job? Also yes. Additionally, the paint ran out much quicker than expected. I was able to get a single coat on the entire tile floor, but the 60 meters of coverage they claim is a little far fetched. Nonetheless, my tile floors look good. A couple tips (no pun intended): get two pens because the coverage is less than advertised, apply 2 coats, REALLY clean the floors before you start (I didn’t deep clean nearly enough and the grime made the paint job much harder), consider another solution unless you have white tile as well (I feel as if this pen would not be great if you needed to be precise), and don’t push as hard on the tip to increase the pen’s longevity. Hope this helps! Still a good product, just a couple things to keep in mind before you buy.

I bought two of these for my spare bathroom where the white grout had yellowed…bam this pen worked great!

very very bright white, if your tiles aren’t super bright white it might look a little off, but honestly a great quick fix. it isn’t as precise as i’d like, especially if your grout lines aren’t perfect or vary in depth/thickness, but overall easy to use and worked as described

Works but not much in the pen. Would need many to cover a large area.

Love this grout pen easy to use and makes my grout look like new

I installed an expensive soft white tile (if there is such a thing) floor in the kitchen when I bought my house. At the time, it was a new product and it was beautiful--that fuzzy, warm feeling changed the first time I dropped a fork. I have been so frustrated no wanting to rip up and put down replacement tiles. The grout pen made it look new again, I am thrilled with the results!

I installed white tile into my main bathroom with two large black dogs and a love of spray tan- not very smart. I felt like I was continuously scrubbing the tile and grout, i also had it pressure washed and I was just about to have someone come in and regrout the tile but thought I would give this a shot first. It takes a bit of time, but it looks so much better and is so much cheaper! It is also very satisfying to watch your progress so the time isn’t too bad.

Easy to use. Covers nicely.

I wore the nub out before it was empty but I may have just been using it wrong. Impressed. Did a way better job than I expected. Recommend if you diy

I wouldn’t buy it