--- 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: "64.92 DT" currency: TND in_stock: true reviews_count: 13 url: https://www.desertcart.tn/products/10800428-grout-pen-dark-grey-tile-grout-paint-marker-restorer-narrow store_origin: TN region: Tunisia --- # Waterproof, water-based ink formula 5mm precision tip for narrow grout lines Covers up to 150 feet of 2mm grout lines 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:** 64.92 DT **Availability:** ✅ In Stock ## Summary > ✨ Transform your grout game with precision & waterproof power! 🖌️ ## 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?** 64.92 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/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 - • **Precision Narrow Tip:** 5mm tip delivers flawless, professional grout line coverage without mess. - • **Waterproof & Durable:** Advanced water-based ink resists moisture for long-lasting, vibrant grout restoration. - • **Universal Application:** Perfect for kitchen, bathroom, patio, and any tile surface needing a clean upgrade. - • **Effortless DIY Upgrade:** Skip scrubbing—instantly refresh or recolor grout lines for a brand-new look. - • **Replaceable Tip Design:** Cotton tip flips or replaces easily, ensuring consistent performance on every project. ## Overview The Grout Pen Dark Grey features a narrow 5mm tip designed for precise application on unsealed grout lines. Its waterproof, water-based ink covers up to 150 feet of 2mm grout, delivering a durable, clean finish ideal for kitchens, bathrooms, patios, and more. With a replaceable cotton tip and easy activation, it’s the perfect tool for quick, professional grout restoration or color change. ## Description 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! Save Money, GROUT PEN Can for large projects. Covers 1,500ft of 2mm grout lines. GROUT PEN White is the most popular of all grout tile colors. It's waterproof when applied directly to unsealed grout lines. Tips need to be primed before use, all brand new GROUT PENS have a dry white tip until they are activated. 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 GROUT PEN color chart is the most exact representation of each color. All GROUT PEN are available in 2 sizes depending on the width of your grout line. GROUT PEN's colorant is strong enough for exterior patio tile grout too. Tips need to be primed before use, all brand new GROUT PENS have a dry white tip until they are activated. Tips are designed to be removable, a worn or damaged tip can be taken out and flipped over. Dark Grey - Narrow Tip Dark Grey 2 Pack - 5mm Dark Grey - Wide Tip Grout Pen Can - 4.2oz White 5mm - Narrow White 2 Pack - 5mm White 15mm - Wide Tip broken, fall out, worn, shredded or damaged? Simply replace it. Available in a Narrow 5mm or Wide 15mm tip size, GROUT PEN can cover thin and thick grout lines. ## 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 | |---------------|-------| | Additional Features | GROUT PEN | | Asin | B0077LMF9Y | | Best Sellers Rank | #26,352 in Tools & Home Improvement (See Top 100 in Tools & Home Improvement) #32 in Tile Grout | | Brand Name | Rainbow Chalk Markers Limited | | Color | Dark Grey | | Customer Reviews | 4.3 4.3 out of 5 stars (4,018) 4.3 out of 5 stars | | Included Components | Grout Pen | | Ink Base | Water | | Ink Color | Dark Grey | | Is Waterproof | TRUE | | Item Diameter | 5 millimeters | | Item Dimensions | 0.7 x 0.7 x 5.5 inches | | Item Type Name | Grout Paint Pen | | Item Weight | 27.22 g | | Line Size | 5 | | Manufacturer | Rainbow Chalk Markers Ltd | | Manufacturer Part Number | GP81116 | | Marker Type | Paint Marker | | Material Type | Grout Paint | | Model Number | GP81116 | | Number Of Items | 1 | | Number Of Pieces | 1 | | Pattern | GROUT PEN | | Point Type | 5mm | | Recommended Uses For Product | Tile Grout | | Style | Modern | | Surface Recommendation | Tile , Floor, Tub, Shower, Countertop, Backsplash, Sink, Wall, Patio | | Target Audience | Adult | | Upc | 722480211164 072248021116 | | Warranty Description | 100% satisfaction guaranteed | | Water Resistance Level | Waterproof | | Writing Instrument Form | Marker Pen | | Writing Technique | Painting | ## 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 ### ⭐⭐⭐⭐⭐ Awesome! *by on Reviewed in the United States 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. ### ⭐⭐⭐⭐⭐ Quick way to make grout look new again *by on Reviewed in the United States July 2, 2026* Easy to use, covers well and quick drying. Only negative is it seems a little overpriced for the product ### ⭐⭐⭐⭐ Not for use in wet areas *by on Reviewed in the United States February 3, 2026* NOT FOR USE IN SHOWERSThis 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 applyCons:- Flakes off if used in a showerRecommendation: 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) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.tn/products/10800428-grout-pen-dark-grey-tile-grout-paint-marker-restorer-narrow](https://www.desertcart.tn/products/10800428-grout-pen-dark-grey-tile-grout-paint-marker-restorer-narrow) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-08-19*