I wasnt even finished touching up the relatively few areas of grout that had mildew stains in my small shower, and the tip became frayed and was impossible to get a precise application and even get more solution out of the tube. Update: After I submitted this review, the company contacted me right away, apologized, and wanted me to be happy with the purchase. The rep, Ashley, explained how to use the product to avoid the issues I had. If only I had known those instructions beforehand! She also refunded me the purchase price AND said shed send me replacement tips. What incredible customer service! I am changing my rating from 1 to 5 stars. I will definitely buy from this company again.

Does exactly what its advertised to do but make sure you actually have WHITE grout before using it, otherwise your results will be freakishly bright. Wish they made these in other colors, like pale grey and beige...

The marker tip did not last more than 1/3 capacity of marker. I have to cut open the marker top and use a point paint bush to use up the paint left inside the marker. For an average shower tile wall, you need at least 2-3 markers.

Not as described Get the wide version not the narrow one

I used the pen on my white tiles in the bathroom. The results were amazing.

This pen is easy to use, and I would buy it again. My only suggestion is regarding how watery the sealant is. It takes a couple of coats to cover stains. I purchased another product to seal the grout in my shower in wider strips, and it seemed more like thicker white paint. It covered stains with one application. The pen is the easiest way to get the job done.

this transformed our grimey kitchen backsplash grout amazingly. takes time for the paint to come out but it works well, dries out quick tho

Its easy to use, except it was hard to get in the thinner grout lines, mostly wasted product on the tile going back and forth to get it down in the grout line. Using a damp cloth, it wipes right off the tile. I dont recommend for price and time, especially if you have small tiles! Im not sure how much I was expecting to get out of 1 pen, but I only got 6 sqft. (Thats 6, 12in by 12in square) I waited a few months to buy this product and now I wish I didnt bother. Debating if Im going to buy 4-5 more to wish my bathroom. Ugh

This was my first time using a grout pen. It worked as intended. You can definitely see the difference from before. It took me a second to get the hang of using the pen, as far as shaking it, dabbing it, and then gliding it. Im an impatient person. I wore through the tip pretty easily. The seller was kind enough to send me replacement tips for no extra charge with a reminder of how to best use the product. From there, it was smooth sailing. I do wish that flow of ink was more consistent; thered be times when it would flow like an uncontrollable river and then other times where I had to dab and press to get the smallest amount out. In those moments, I thought the pen was dry...until the uncontrollable river would yet again flow. I guess im saying that its hard to know when the pen is actually dry. To grout seal my master bath floor, shower, upstairs bath floor, and laundry room, I ended up buying 4-5 of these pens. It adds up, but theres not much you can do about it. And its a good product. It did what I wanted it to do. I bought one last pen to have for touchups.

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!