---
product_id: 10800428
title: "Grout Pen Dark Grey Tile Grout Paint Marker Restorer - Narrow 5mm Tip (7mL) | Waterproof Grout Line Refresher for Kitchen & Bathroom, Colorant and Sealer Pens for Cleaner Looking Grout Lines - Dark Grey"
brand: "rainbow chalk markers limited"
price: "$18.85"
currency: USD
in_stock: true
reviews_count: 13
category: "Rainbow Chalk Markers Limited"
url: https://www.desertcart.us/products/10800428-grout-pen-dark-grey-tile-grout-paint-marker-restorer-narrow
store_origin: US
region: United States of America
---

# Waterproof & water-based formula Covers up to 150ft of 2mm grout 5mm narrow precision tip Grout Pen Dark Grey Tile Grout Paint Marker Restorer - Narrow 5mm Tip (7mL) | Waterproof Grout Line Refresher for Kitchen & Bathroom, Colorant and Sealer Pens for Cleaner Looking Grout Lines - Dark Grey

**Brand:** rainbow chalk markers limited
**Price:** $18.85
**Availability:** ✅ In Stock

## Summary

> 🖌️ Refresh your grout, refresh your space — don’t let dull tiles hold you back!

## Quick Answers

- **What is this?** Grout Pen Dark Grey Tile Grout Paint Marker Restorer - Narrow 5mm Tip (7mL) | Waterproof Grout Line Refresher for Kitchen & Bathroom, Colorant and Sealer Pens for Cleaner Looking Grout Lines - Dark Grey by rainbow chalk markers limited
- **How much does it cost?** $18.85 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/10800428-grout-pen-dark-grey-tile-grout-paint-marker-restorer-narrow)

## Best For

- rainbow chalk markers limited enthusiasts

## Why This Product

- Trusted rainbow chalk markers limited brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Eco-Friendly & Safe:** Non-toxic formula perfect for kitchens, bathrooms, and family spaces.
- • **Instant Grout Revival:** Transform dingy grout lines into fresh, vibrant surfaces without scrubbing.
- • **Precision Application:** Narrow 5mm tip ensures clean, professional results on tight grout lines.
- • **Durable Waterproof Finish:** Advanced water-based ink resists scrubbing and moisture for long-lasting color.
- • **Replaceable Tips & Easy Activation:** Removable cotton tip and simple priming pump keep your pen working like new.

## Overview

The Grout Pen Dark Grey is a waterproof, non-toxic grout paint marker with a narrow 5mm tip designed for precise application on unsealed grout lines. It covers up to 150 feet of 2mm grout, delivering a durable, vibrant finish that revitalizes tile grout in kitchens, bathrooms, and patios. Featuring a replaceable cotton tip and easy priming system, this pen offers a quick, mess-free solution to grout discoloration and wear, making your tiled surfaces look brand new with minimal effort.

## Description

GROUT PEN Make your Tile Grout look new again! Or change the color of your existing grout to a new and better color. Try a new grout color now. Our story began in 1994 when we first started developing our products. Our first product was the Liquid Chalk Marker which soon became a market leader due to the brilliant formula and ease of use. Our knowledge and passion for water & chalk based products began to expand, which led us to bring more fantastic DIY products to the market! GROUT PEN in White Visit the Store GROUT PEN in White Visit the Store GROUT PEN in Beige Visit the Store GROUT PEN in Beige GROUT PEN in Black Visit the Store GROUT PEN in Black GROUT PEN in Light Grey Visit the Store GROUT PEN in Light Grey GROUT PEN in Grey Visit the Store GROUT PEN in Grey GROUT PEN in Dark Grey Visit the Store GROUT PEN in Dark Grey GROUT PEN in Off-White (Ivory) Visit the Store GROUT PEN in Off-White (Ivory) GROUT PEN in Winter Grey Visit the Store GROUT PEN in Winter Grey GROUT PEN in Brown Visit the Store GROUT PEN in Brown GROUT PEN in Cream Visit the Store GROUT PEN in Cream GROUT PEN paint in a can! Save Money, GROUT PEN Can for large projects. Covers 1,500ft of 2mm grout lines. GROUT PEN paint in a can! Save Money, GROUT PEN Can for large projects. Covers 1,500ft of 2mm grout lines. 10+ Colors for Tile Grout Waterproof GROUT PEN White is the most popular of all grout tile colors. It's waterproof when applied directly to unsealed grout lines. Waterproof GROUT PEN White is the most popular of all grout tile colors. It's waterproof when applied directly to unsealed grout lines. The GROUT PEN I received has a dry white tip, is it broken or did I receive the wrong color? Tips need to be primed before use, all brand new GROUT PENS have a dry white tip until they are activated. The tip of my GROUT PEN fell out or is worn down, is my pen broken? Tips are designed to be removable so when a tip becomes worn or damaged it can be taken out and flipped over. If the tip falls out do not worry, simply put it back in and keep working. The color of the pen cap is not exactly the color I want The GROUT PEN color chart is the most exact representation of each color. The GROUT PEN I received has a dry white tip, is it broken or did I receive the wrong color? Tips need to be primed before use, all brand new GROUT PENS have a dry white tip until they are activated. The tip of my GROUT PEN fell out or is worn down, is my pen broken? Tips are designed to be removable so when a tip becomes worn or damaged it can be taken out and flipped over. If the tip falls out do not worry, simply put it back in and keep working. The color of the pen cap is not exactly the color I want The GROUT PEN color chart is the most exact representation of each color. GROUT PEN - Wide or Narrow All GROUT PEN are available in 2 sizes depending on the width of your grout line. GROUT PEN - Wide or Narrow All GROUT PEN are available in 2 sizes depending on the width of your grout line. Inside or Outside GROUT PEN's colorant is strong enough for exterior patio tile grout too. Inside or Outside GROUT PEN's colorant is strong enough for exterior patio tile grout too. Prime the Tip Tips need to be primed before use, all brand new GROUT PENS have a dry white tip until they are activated. Prime the Tip Replaceable Tips Tips are designed to be removable, a worn or damaged tip can be taken out and flipped over. Replaceable Tips Tips are designed to be removable, a worn or damaged tip can be taken out and flipped over.

Review: Would purchase again if I need it. - Simple to use, fast results and permanent. It enhances the tile work and makes the floor look cleaner. It is some very tough material and stands up to scrubbing floors well. I recommend using it to cover old grout to refresh color or to change it.
Review: Awesome! - I just finished my grout coloring projects today. I must say that I am very pleased with the grout pen(dark gray) so far. I purchased three pens for my kitchen backsplash and a shower wall. One wall in my shower has a dark gray grout, which in spots was beginning to discolor. I scrubbed and scrubbed, however, I could not bring the color back. I used a dark gray grout pen and colored all of the grout on that shower wall and it turned out great. It was easy to use, clean up of any excess on the tile was simple and the color looks great. See photos. Next, my kitchen backsplash. The backsplash is made up of white subway tile with white grout. The only problem is that the white grout became very dingy and yellowish over time. I used the same dark gray grout pens for the backsplash and it turned out amazing. See photos. The grout pens last a long time in my opinion. I used maybe one and a half pens for both my kitchen backsplash and shower wall. I even double coated near the kitchen sink and behind the oven for extra protection. It took me about 8 hours to do the kitchen and shower wall. My recommendation to you would be to complete your task, allow the grout to dry for an hour or so and come back to wipe down the excess color off of the tiles. With a damp cloth, the excess color wipes right off of the tiles. With a non-porous tile, you don’t need to worry about coloring outside the lines. It will not stain. Don’t wipe down after every bit of color you get on the tile, it will add so much time to your job. Wait until you’re all finished, then clean. I used microfiber towels, bundled up and damp. I worked it in circle motions through the tile wall, trying not to apply to much pressure to the grout lines. When the grout color is fresh, some may wipe off if you apply too much pressure directly to the grout. This is why I recommend waiting an hour + before wiping down. Allow it to settle into the grout. I started wiping too quickly after application and had to add some color again. After you clean up the excess color off of the tiles, examine for any touch up areas. There will likely be a few. Some reviews addressed the pen tip breaking. I never experienced this. During the color process, keep a paper plate handy to dab and prime the color into the pen tip. Do this often and you won’t need to press hard while coloring. I could see it breaking if you go all King Kong on it. I can’t speak for the durability of the product yet, but as time goes on, I will update my review. I may add a spray on tile/grout seal after a few days to help protect the color as well.

## Features

- LOOK BRAND NEW: Skip scrubbing tiles and use GROUT PEN to paint and recolor your grout for a bright clean appearance
- USE ANYWHERE: Ideal for the bathroom, kitchen, and any other room that has floor or ceiling tiles
- LONG LASTING INK: Tackle small or large DIY projects with a pen that covers up to 150 feet of thin 2mm grout
- ADVANCED FORMULA: Non-toxic, water-based colorant that covers grubby grout stains making it look brand new again
- CAP COLOR: Use the color chart (see images) for most accurate color depiction. Pen cap represents each pen's color but is not expected to be the exact shade, do a small test area first
- USE ON UNSEALED GROUT ONLY: GROUT PEN may not bond to sealed grout. Test grout with a few drops of water. If the grout does not absorb the water within a minute this means the grout is likely sealed.
- TIP MAY WEAR DOWN: Tip is made of cotton, pressing too hard will damage tip. Contact seller for replacement tips if needed
- SHAKE ONLY WITH CAP ON: Tip is removable and may fall out if shaken hard, only shake pen with cap on (note - Pen does not need to be shaken at all, instead gently pump tip to activate)
- DRY TIP: Pen needs to be primed before use, all new GROUT PENs come with a dry white tip. To activate rapidly pump the tip (30+ times) until fully saturated

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0077LMF9Y |
| Additional Features | GROUT PEN |
| Best Sellers Rank | #20,359 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #25 in Tile Grout |
| Brand | Rainbow Chalk Markers Limited |
| Brand Name | Rainbow Chalk Markers Limited |
| Color | Dark Grey |
| Customer Reviews | 4.2 out of 5 stars 5,096 Reviews |
| Included Components | Grout Pen |
| Is Waterproof | TRUE |
| Item Dimensions | 0.7 x 0.7 x 5.5 inches |
| Item Type Name | Grout Paint Pen |
| Item Weight | 25 Grams |
| Manufacturer | Rainbow Chalk Markers Ltd |
| Manufacturer Part Number | GP81116 |
| Material Type | Grout Paint |
| Model Number | GP81116 |
| Number of Items | 1 |
| Number of Pieces | 1 |
| Pattern | GROUT PEN |
| Special Feature | GROUT PEN |
| Style | Modern |
| Surface Recommendation | Tile , Floor, Tub, Shower, Countertop, Backsplash, Sink, Wall, Patio |
| UPC | 722480211164 072248021116 |
| Warranty Description | 100% satisfaction guaranteed |
| Water Resistance Level | Waterproof |

## Product Details

- **Brand:** Rainbow Chalk Markers Limited
- **Item Weight:** 25 Grams
- **Item dimensions L x W x H:** 0.7 x 0.7 x 5.5 inches
- **Material:** Grout Paint
- **Style:** Modern

## Images

![Grout Pen Dark Grey Tile Grout Paint Marker Restorer - Narrow 5mm Tip (7mL) | Waterproof Grout Line Refresher for Kitchen & Bathroom, Colorant and Sealer Pens for Cleaner Looking Grout Lines - Dark Grey - Image 1](https://m.media-amazon.com/images/I/71TEUe9rSEL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: Can this be used over painted/sealed grout?**
A: I used on sealed grout and it worked great

**Q: What is the difference in the pen sizes? Does one contain more product or does it have a bigger tip?**
A: The Large Pen is 15mm wide (about the size of a typical Jumbo Marker).  The 5mm pen is about the size of a regular sharpie marker.

**Q: What size room does one pen cover?**
A: Good question.  The manufacturer states "up to 60 meters coverage for narrow grout joints".  60 meters is approximately 196 linear feet, however results vary as the porosity of grouts can very greatly.

**Q: Will this pen let me change the color of grout that is currently white but discolored? I want grey grout lines on my bathroom floor.**
A: Yes

## Customer Reviews

### ⭐⭐⭐⭐⭐ Would purchase again if I need it.
*by C***R on March 31, 2026*

Simple to use, fast results and permanent. It enhances the tile work and makes the floor look cleaner. It is some very tough material and stands up to scrubbing floors well. I recommend using it to cover old grout to refresh color or to change it.

### ⭐⭐⭐⭐⭐ Awesome!
*by C***J on March 24, 2019*

I just finished my grout coloring projects today. I must say that I am very pleased with the grout pen(dark gray) so far. I purchased three pens for my kitchen backsplash and a shower wall. One wall in my shower has a dark gray grout, which in spots was beginning to discolor. I scrubbed and scrubbed, however, I could not bring the color back. I used a dark gray grout pen and colored all of the grout on that shower wall and it turned out great. It was easy to use, clean up of any excess on the tile was simple and the color looks great. See photos. Next, my kitchen backsplash. The backsplash is made up of white subway tile with white grout. The only problem is that the white grout became very dingy and yellowish over time. I used the same dark gray grout pens for the backsplash and it turned out amazing. See photos. The grout pens last a long time in my opinion. I used maybe one and a half pens for both my kitchen backsplash and shower wall. I even double coated near the kitchen sink and behind the oven for extra protection. It took me about 8 hours to do the kitchen and shower wall. My recommendation to you would be to complete your task, allow the grout to dry for an hour or so and come back to wipe down the excess color off of the tiles. With a damp cloth, the excess color wipes right off of the tiles. With a non-porous tile, you don’t need to worry about coloring outside the lines. It will not stain. Don’t wipe down after every bit of color you get on the tile, it will add so much time to your job. Wait until you’re all finished, then clean. I used microfiber towels, bundled up and damp. I worked it in circle motions through the tile wall, trying not to apply to much pressure to the grout lines. When the grout color is fresh, some may wipe off if you apply too much pressure directly to the grout. This is why I recommend waiting an hour + before wiping down. Allow it to settle into the grout. I started wiping too quickly after application and had to add some color again. After you clean up the excess color off of the tiles, examine for any touch up areas. There will likely be a few. Some reviews addressed the pen tip breaking. I never experienced this. During the color process, keep a paper plate handy to dab and prime the color into the pen tip. Do this often and you won’t need to press hard while coloring. I could see it breaking if you go all King Kong on it. I can’t speak for the durability of the product yet, but as time goes on, I will update my review. I may add a spray on tile/grout seal after a few days to help protect the color as well.

### ⭐⭐⭐⭐ Not for use in wet areas
*by R***N on February 3, 2026*

NOT FOR USE IN SHOWERS This is a great product for floor or wall repair, but given it's water-soluble, it should not be used in wet areas. I used it on my bathroom floor and it worked great. It’s easy to apply. The one thing to be aware of it that you should have a dense sponge (like a “magic eraser”) and once you go over the line, pass over it again with the sponge to even it out. Looks great. I tried it in my shower, however, and it's terrible. It lasts a couple of days, then it starts to flake off. My grout has an interesting color - when it's dry it's almost white (and a perfect match to this gray), but when it gets wet, it turns dark gray (almost black), so, where the product flakes off, you see black portions of the grout coming through. It looks like mold! The treatment seems to last no more than a couple of days. I've tried re-treating it and then sealing it with a clear grout sealer, all to no avail. The product is just not strong enough for shower floor. As I said, the rest of the bathroom seems just fine, it's just the shower floor that seems to suffer. Upside is that it removes pretty easily - I took a nail brush and some alcohol and got most of it up. Now looking for a different solution. Pros: - easy to apply Cons: - Flakes off if used in a shower Recommendation: OK to use in other parts of the bathroom or kitchen, but not where standing water will collect.

## Frequently Bought Together

- Grout Pen Dark Grey Tile Grout Paint Marker: Waterproof Tile Grout Paint Pen Colorant, Grout Shine Touch Up & Renew - Dark Grey, Narrow 5mm Tip (7mL)
- Grout Pen Black Tile Paint Marker: Waterproof Grout Paint, Tile Grout Colorant and Sealer Pen - Black, Narrow 5mm Tip (7mL)

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-07-23*