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🖤 Transform your grout, transform your space—no mess, all wow!
Rainbow Chalk Markers Limited Grout Pen is a professional-grade, waterproof grout colorant pen featuring a 5mm precision nib and a non-toxic, water-based formula. Designed to cover up to 150 feet of narrow grout lines, it effortlessly refreshes and recolors grout in kitchens, bathrooms, and more, delivering a long-lasting, vibrant black finish that’s quick-drying and eco-friendly.





| ASIN | B09GG8J3JY |
| Best Sellers Rank | #97,938 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #310 in Tile Grout #708 in Flooring Products |
| Brand Name | Rainbow Chalk Markers Limited |
| Color | Black |
| Compatible Material | Unsealed Grout |
| Customer Reviews | 4.2 4.2 out of 5 stars (1,226) |
| Included Components | (2) Grout Pen & (2) Extra Tips |
| Item Dimensions | 9.5 x 1.4 x 19 centimeters |
| Item Form | Pen |
| Item Weight | 25 Grams |
| Manufacturer | RAINBOW CHALK MARKERS LTD |
| Material Type | Colorant |
| Model | GP81107/2 |
| Number of Items | 1 |
| Part Number | GP81107/2 |
| Style Name | Modern |
| Surface Recommendation | Tile , Floor, Tub, Shower, Countertop, Backsplash, Sink, Wall, Patio |
| Water Resistance Level | Waterproof |
S**A
This pen was excellent. My black grout was faded. The pen was extremely easy to use, easy to wipe off. The nib just flowed along the grout lines with ease. No oder. I bought the double pack but didn't need the second pen. The whole thing was much fun and had such great results, I wish I had more to do!
J**.
These grout pens are the best way to transform your tiles! I have used in both bathroom and kitchen on white grout and they’re fantastic. Two pens were more than enough for the kitchen. For my shower tiles, approx 6 Sam I used 4. Not because the ink ran out, but because the nib starts to blunt and the drawing line becomes thicker. To keep the lines consistent I switch pens more regularly. Long lasting as well. The colour is black, as for it being waterproof it is to an extent. The kitchen area hasn’t required a touch up in 18 months. The bathroom, as it has shower watering hitting and more abrasive cleaner used does start to come off but a quick touch up every 6 months works well. Brilliant value for money and so much easier than re grouting. Dries quicker. Great coverage. Highly recommend.
M**N
Works well, super easy to use!
L**.
Kann ich nur empfehlen, Fugen aufgewertet und hält jetzt seit 2 Jahren
A**R
I've already used these, follow instructions regarding cleaning of grout and it's easy to use, covers really well and lasts, even when using a steam mop, usually re paint around every 12 months, I have the black cus I've got black grout, can't comment on other colours.
Trustpilot
2 days ago
2 weeks ago