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🖌️ Transform your tiles, transform your space—don’t let dull grout hold you back!
The Twin Pack Dark Grey Grout Pen by Rainbow Chalk Markers Ltd offers a professional-grade, water-based solution to restore and recolor tile grout lines. Each pack includes two pens with a combined coverage of up to 120 meters on 2mm grout lines. Featuring a reversible tip for extended use and an anti-bacterial formula to prevent mold, this pen is perfect for kitchens and bathrooms on ceramic, porcelain, and concrete surfaces. Lightweight and easy to use, it delivers a clean, water-resistant finish that revitalizes your tiles with minimal effort.











| ASIN | B09GG6XJ1N |
| Best Sellers Rank | 6,415 in DIY & Tools ( See Top 100 in DIY & Tools ) 26 in Tile Grout |
| Brand | RAINBOW CHALK MARKERS LTD |
| Colour | Dark Grey |
| Compatible Material | Ceramic, Porcelain, Concrete |
| Country Of Origin | United Kingdom |
| Customer Reviews | 4.3 out of 5 stars 806 Reviews |
| Item Dimensions | 9.5 x 1.4 x 19 centimetres |
| Item Form | Pen |
| Item Weight | 25 Grams |
| Item dimensions L x W x H | 9.5 x 1.4 x 19 centimetres |
| Item weight | 25 Grams |
| Manufacturer | Rainbow Chalk Markers Ltd |
| Manufacturer Part Number | GP81116/2 |
| Material | Water Based |
| Model Number | GP81116/2 |
| Number of Items | 1 |
| Number of Packs | 2 |
| Product Warranty | 30 days |
| Style | Cover Up |
| Style Name | Cover Up |
| Surface Recommendation | Tile |
| Unit Count | 14.0 millilitre |
| Water Resistance Level | Water Resistant |
| Water resistance level | Water Resistant |
L**Z
Grout pens
Worked really well
A**A
Great but you need more than you think
These are great, easy to use, i started off trying to draw inside the lines but i have slightly wavy tiles and i eventually found it easier to just draw on 'badly' and then wiping the excess off the tiles once dry. I absolutely love the outcome my only complaint and hence 4stars is that you can only get probably half the pen out because the nib gives up. i bought 4 and only got around just half of my small splash back. no amount if shaking or trimming the nib would help. you could sense there was still paint inside the pen but it was unusable
K**Y
Must buy this, it is truly worth it.
This is surprisingly good. I had high hopes but low expectations. But this is fantastic all round. This was to smarten up the kitchen in our narrowboat. The walls slope in so I expected this to not work. But it did. I had to dab it fairly often but it was so worth it. Leave to dry then clean tiles. Looks amazing.
J**N
Transformed my bathroom
This product is nearly black so bare that in mind. It has absolutely transformed my bathroom. I used white tile paint and then went over the grout with this pen. It’s really easy to use. You do need to keep pumping the product in to the nib I used two at the same time and kept them nib down between switches. It doesn’t run, I pressed very lightly as I had seen comments about the nibs deteriorating quickly. I didn’t have an issue with the nibs at all. If you do make a mistake you can wipe it away immediately but I mean immediately. I have done around the shower and after leaving to dry for 24hours. I’ve not had a problem in two months of the product washing away as others have said.
H**T
Review
They run out far too quickly
J**R
Brilliantly easy and looks fantastic!
These have been sat on my worktop for almost 3 months because I thought they were going to be difficult to use… how wrong I was! Two bathroom floors done in 20 minutes! Really impressed and will be buying another set in white to do my shower tiles 😃
M**E
Really easy to use but colour slightly off
I really enjoyed going over the grout on the downstairs loo and kitchen floor with this, so satisfying for it all the be the same colour again and looks new! Only thing is this has a slightly blueish tint to it, so didn't match the dark grey grout on the walls in the loo. Otherwise really good. Both pens were enough to do both jobs
%**4
Excellent product
Did the job as described by product very wrll
G**O
Fugenstift funktioniert super !!
Wer diesen Fugenstift als schlecht bewertet macht was falsch. Was manche schreiben das sie so drücken, ist nicht nötig. Es ist so einfach. Ca. 30 x den Stift runter drücken und schon ist es bereit. Die Fugen sehen super schön aus. Ich weiß nicht wie lange das ganze hält. Aber der erste Eindruck ist super.
A**3
Fast and easy if you use this suggestion
We have slate tiles with 3/16 grout width. Over time the grout color looked uneven, especially where we had some white water stains. I hadn't had a good result doing a grout refresh outside (with a different product) so was a little sceptical this would work. I was pleasantly surprised with this easy to use product. The marker tips will wear down, but you can minimize this if you use a little application secret I discovered by trial and error. Application tips: 1. Make sure the tile and grout is very clean. Wash it with a mild tile cleaner and let dry. 2. Vacuum. This is critical to getting up small debris and dust which can wear down the marker. 3. Here's the big tip: use TWO markers. Use the first one to do a 'rough' application down the middle of the grout line. Don't worry about catching every spot, just run it quickly along the line. Shake often. Do not press hard, in fact, don't really press at all. Just let the liquid flow. Then go back with the second marker and fill in as needed, especially along the sides of the grout where it meets the tile. The reason for this is that the marker tips will dry out and wear down. If you try to do the line all at once with one marker, the tip will wear out prematurely, well before the liquid is used up. Yes, you can reverse the tip (use a pair of pliers), but even that won't let you use the entire container. By following this advice you will always have a clean tip with a sharp point to use along the edges and fill in spots. Another suggestion: Buy a pack of the replacement tips. When the tip from the second applicator (the one you use for the 'fine' touch up) wears down a little, transfer it to the first applicator for the rough in, and put a new tip on the second applicator. I had a few spots where there were water stains from efflorescence that I simply couldn't remove with any means I tried. Not expecting much, I used the grout pen over them, and to my surprise even after 2 months it still looks great. Coverage: the first pen I used I didn't follow the process above and got about 30% less coverage than the package suggested. After I switched the approach, I actually got about 30% more coverage. Overall, a very quick and easy way to clean up grout. One note on the 'dark grey': I'd call it more of a medium grey. We have grey slate tiles, and it is a littler lighter than the stone.
S**H
Project done!
I painted my tiles, used this pen for the grout line, then used the top coat over it all. Turned out better than expected! Works wonderful, but order double the amount then you plan!
L**A
Schimmel Silikon Dusche - perfekt
Habe mit Schimmel an den silikonfugen zu kämpfen - mit reiningungsmittel ging es leider nicht Weck - der Stift ist perfekt dafür - das Bad sieht aus wie neu - absolute Empfehlung
I**B
Einfach genial
Absolut top!!! Vorher nachher Effekt ist massiv!! Sehr einfache Anwendung und es funktioniert fantastisch. Ein Stift hat auch für die angegebene Fläche gereicht. Hab gleich noch mehr bestellt.
Trustpilot
2 weeks ago
4 days ago