Rainbow Chalk Markers Limited Grout Pen Light Grey – Waterproof Tile Grout Paint, 5mm, 2-Pack

Refresh tile grout with ease

The Grout Pen Light Grey from Rainbow Chalk Markers Limited is a waterproof tile grout colorant and sealer pen designed for quick, mess-free updates. It helps transform dull grout into a bright, uniform look across bathroom and kitchen tiles—without a full grout scrub.

Key benefits at a glance

• 2-pack with extra tips for ongoing use across multiple projects
• Each pen holds 7 mL of water-based colorant for interior tile work
• Narrow 5 mm tip provides precision on slim grout lines
• Waterproof formula helps resist everyday moisture and grime

The color cap serves as a quick reference to the shade family, helping you plan color matches before applying. Keep in mind that the cap color is not guaranteed to be an exact shade; a small test area is recommended for best results.

How it works and where to use

Made with a non-toxic, water-based colorant, this pen is designed to cover grubby grout stains and bring back a clean look for interior tile installations. It is intended for unsealed grout, as sealed grout may resist bonding. A simple water test can help you determine grout porosity before use.

• Best suited for unsealed grout in bathrooms, kitchens, and other tile surfaces
• Ideal for both small touch ups and larger color rejuvenation projects

Application tips for best results

• Ensure the cap is on and shake returns are minimized to protect the tip
• Prime the dry tip by pumping 30+ times until saturated before first use
• Apply with light, steady strokes and minimal pressure to avoid tip wear
• Test a small area first to confirm color and adhesion on your grout type

If the tip wears down, replacement tips are available from the seller. The pen is designed to be used with the cap on during activation, and the tip is removable if a quick refresh is needed after extended use.

What you get and practical use cases

Two markers and extra tips in a compact kit make it easy to tackle routine maintenance or a larger grout refresh. The light grey shade provides a neutral contrast that complements a wide range of tile colors, making it a flexible choice for everyday spaces like bathrooms and kitchens where grout shows wear over time.

• Great for updating grout in frequently used rooms
• Supports both quick spot fixes and more comprehensive color rejuvenation