4x Grout Pen Light Grey Tile Paint Marker: Waterproof Tile Grout with Extra Tips
USE ON UNSEALED GROUT ONLY: GROUT PEN may not bond to sealed grout. LONG LASTING INK: Tackle small or large DIY projects with each pen covering up to 150 feet of thin 2mm grout lines. TOUCH DRY: The ink is touch dry in 5 minutes, however allow for 25 hours before getting your newly colored grout lines wet.