This is a repeat order. Love this product. When your grout is dirty and nothing seems to help, this will work wonders. Easy to apply, long lasting.

I found it very easy to use and it instantly refreshes old grout lines to look like new! I used this on our white tiled kitchen counters and island, the area that gets the most discolored from food. I used to use white paint with a small paint brush to refresh the grout in the kitchen, but that would take time and start to peel off and not last that long. If chunks of grout actually came out (rare), I assume Id need to mix some grout and fill it with that, but for discolored tile, I just quickly use this on top of my old discolored grout lines, and its fantastic, I would buy this again for my needs. it probably helps that the tile is white too, but if i go over the grout line onto the tile, it easily comes off the tile. I just got this pen, so i couldnt review the longevity or easy to remove yet. I also dont know how this would work in the shower where water gets on it all the time, our shower tiles dont have white grout and arent discolored. But for the kitchen with white tile and white grout, its so far ideal!

I posted a negative review on this product and the company contacted me. They apologized for the markers and wanted to refund me. I told them I was ok with not being refunded because as bummed as I was sometimes things just happen on a production line that are out of you hands and I think thats what happened here. The next day after that they refunded the money anyways. I wanted to update my review with this information but editing the old review was not an option so I wrote this instead. The markers that were good were very impressive. The look of the shower after finishing was a complete transformation and looked beautiful. In all I believe this company to be honorable with a quality of product that is great too. Like I said, sometimes production lines can get wonky, it can happen to anyone and this company did all they could to please me.

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

I used this for my bathroom floor. The floor looks great and new. Very easy to use.

I rent and can not get my nasty grout replaced. This worked nicely, although I needed 3 for my small shower. After a few months it’s looking grungy again. It’s good as a temporary fix but it’s not going to solve any problems long term.

Had a very nasty looking ring of yellow at the front base of my toilet. No doubt I could call it a “guy ring”. Had purchased a large container of filler from big box store that asked my guy to use on the stain. I was frustrated that my guy never attempted to use it, so I read the directions and found that I needed a special applicator gun for filling the grout line. After some research and reading the reviews, I found this handy dandy pen. PERFECT!!!! Not only was it super easy to use, it covered the stain easily and quickly in one application. I did my second toilet as well. I probably should have gotten off white to match what was there already. Instead I just ran a line around the whole base. My only wish if there to be a larger amount or larger pen for reapplication if it turns yellow again. Hence why one star is taken away. I would gladly just order a second one. HIGHLY RECOMMEND!

Worked great to make my front entry tiles looks brand new. Only issue I had was that the end of the marker got really soft really fast. Because grout is pretty rough the end of the marker got soft and flimsy pretty quickly making it hard to make straight lines and hard to get the grout to coat well. Otherwise was a great product overall.