This Grout Pen in Light Grey is a tile grout colorant and sealer pen designed to refresh and recolor unsealed grout lines. With a wide 15mm tip and a 20 mL water-based formula, the pen is suited for DIY touch-ups in kitchens, bathrooms, and other tiled areas where grout has become stained or discolored. The pen arrives with a dry white tip that must be primed—rapidly pump the tip (about 30+ times) until saturated. Only shake the pen with the cap on; the tip is removable and may wear down with heavy pressure, and replacement tips are available from the seller if needed. Cap color represents the pen shade but may not be an exact match, so testing a small area first is recommended. For best results use on unsealed grout only: test grout with a few drops of water and confirm it absorbs within a minute. The synthetic, water-based formula makes application straightforward for homeowners tackling grout refresh projects without intensive scrubbing.