Rainbow Chalk Markers Grout Pen Black – Waterproof Tile Grout Paint & Sealer (3-Pack, 5mm)

Refresh grout with a precise, waterproof touch

Rainbow Chalk Markers Grout Pen Black offers a fast, modern way to recolor and seal tile grout without heavy scrubbing. The water-based, non-toxic colorant dries to a durable, uniform black that enhances the contrast of tile lines and gives grout a refreshed, near-new look.

Designed for high-contrast updates across bathrooms, kitchens, and any room with wall, counter, or floor tiles, this pen is versatile enough for small touch-ups or larger DIY projects. The three pens in each 3-pack provide consistent color across multiple areas, and the 7 mL capacity with a narrow 5 mm tip supports careful, controlled lines around corners and grout seams.

What’s included and how to measure coverage

Each 3-pack brings three pens in a consistent black shade, offering dependable color across multiple areas. With a single pen capable of covering up to 150 feet of thin 2 mm grout, you can tackle several spaces before refilling or replacing tips.

Key benefits you may notice

• Brightens grout by recoloring dull lines for a cleaner, lifted look.
• Water-based formula acts as both colorant and sealer for tiled surfaces.
• Non-toxic and low-odor, suitable for indoor use around families and pets.
• Cap color helps identify the shade; a small area test is recommended for best match.
• Narrow 5 mm tip enables precise lines and detailed work along seams.

Tips for best results

• Use on unsealed grout only; test absorption by dropping water on a small area.
• Prime the tip by pumping with the cap on until fully saturated; the tip ships dry.
• Apply with a light touch to preserve the tip; if wear occurs, contact the seller for replacements.
• Shake with the cap on; rapid pumping activates the tip without requiring full shaking of the pen.

Real-life scenarios

Imagine reviving a dingy bathroom backsplash or refreshing grout lines between kitchen tiles after years of steam and daily use. The precise 5 mm line helps maintain clean edges on small mosaics, while the deep black shade offers a modern, cohesive look across surfaces that see regular wear.

Note: Results vary with grout condition and surface prep. This product provides a practical option for DIY grout color updates without the expense of regrouting.