Rainbow Chalk Markers Limited Grout Pen Grey – 2-Pack, 7mL, Waterproof

Give tired grout a rejuvenated look without hours of scrubbing. The Grout Pen Grey from Rainbow Chalk Markers Limited applies a durable, water-based colorant to grout lines, delivering a fresh, uniform appearance across tile surfaces. This two-pack equips you with extra tips and a generous 7mL reservoir, making it a practical tool for bathroom, kitchen, or any tile setting where grout shows wear.

Designed for unsealed grout, the pen offers a controlled flow that helps you color-match and restore contrast between tile and grout. The formula is non-toxic and water-based, offering a clean, low-odor option for DIY projects. While the cap color provides a helpful shade hint, the product advises a small test area to confirm the exact match before broader use.

What you get and how it helps

• 2-pack with extra tips for ongoing projects, so you’re not left short mid-task.
• 7mL per pen provides substantial coverage on thin 2mm grout lines, reducing the need for frequent re-application.
• 5mm precision tip supports quick, tidy strokes along grout joints with less mess.
• Non-toxic, water-based colorant helps revive grout color and restore a bright, clean appearance.

How to use and practical tips

• Cap color acts as a shade guide; test a small area first to confirm the result before wider use.
• Use on unsealed grout only. A quick water test helps you determine porosity (if water is absorbed within a minute, grout is likely unsealed).
• Prime the tip by pumping with the cap on until the color saturates the tip; then paint in thin strokes.
• Avoid pressing hard to prevent tip wear; if needed, replace tips from the included extras.
• Shake with the cap on if you need to re-activate the color—cap stays on during shaking.

Because results depend on grout condition and porosity, plan for the possibility of multiple passes for an even, consistent finish. After use, recap securely and store upright to preserve tip longevity.