Black Grout Pen – Waterproof Tile Colorant & Sealer, 2 Pack with Tips
USE ON UNSEALED GROUT ONLY: GROUT PEN may not bond to sealed grout. Available in a Narrow 5mm or Wide 15mm tip size, GROUT PEN can cover thin and thick grout lines. Draw the line on tired grout. LONG LASTING INK: Tackle small or large DIY projects with a pen that covers up to 150 feet of thin 2mm grout.