Rainbow Chalk Markers Grout Pen Dark Grey – Waterproof Grout Paint, Tile Colorant & Sealer (2-Pack, 7mL)

Refresh dull grout in seconds with the Grout Pen Dark Grey from Rainbow Chalk Markers Limited. This waterproof, water based colorant is designed to recolor grout lines between tiles, delivering a brighter, more cohesive look without a full scrubbing session. The deep, neutral tone blends with many tile shades, making it a versatile choice for kitchens, bathrooms, backsplashes, and other tiled spaces.

What you get and how it works

• Two 7 mL pens in a single pack, engineered to cover thin 2 mm grout lines with lasting pigment.
• Includes extra tips for extended projects and precise edging; tip is cotton and may wear with heavy pressure.
• Non-toxic, water-based colorant helps recolor grout without harsh chemicals; color reference is shown on the cap.
• Cap color is a guide for shade matching; for best results, perform a small test area before full application.
• Designed for unsealed grout; if grout is sealed, bonding may be limited—test a small area first.

Usage tips and best practices

• Prime the tip before first use by pumping with the cap on until the tip is fully saturated.
• Apply with a light touch to achieve an even, streak-free finish; avoid pressing too hard to protect the tip.
• Work in sections, wipe away any excess promptly, and allow the color to dry as directed.
• Shake only with the cap on to prevent tip loss; the tip is removable but should be handled gently.

Visual and practical benefits

• Brightens grout lines for a fresh, modern look without a renovation.
• Waterproof finish helps maintain the refreshed appearance in moisture-prone areas like baths and kitchens.
• Color chart on the cap helps you choose the closest shade to your tile.

Note that outcomes vary with grout porosity and whether grout is sealed. Always test a small area first and follow priming and application steps for best results. This grout pen supports quick DIY tile refresh projects, offering a practical way to maintain a clean, cohesive look between professional cleanings.