Review on 🔲 Waterproof Dark Grey Grout Pen: Tile Colorant and Sealer Marker - Dark Grey, Narrow 5mm Tip (7mL) by Trevor Blazis

These knobs are great. I updated the bathroom grout at home that we just bought. The mortar was once white but looked dirty and impossible to keep clean. The dark gray looked a bit bluish at first, but now that it's dry it's definitely not a gray. Be sure to have wet towels ready. I painted two feet by two feet at a time over an area and then wiped the area with a clean damp cloth to wipe away any excess. I definitely need more to complete my 6x9 foot bathroom. Two handles finished about half of the bathroom with one layer. I immediately ordered a few more pens to round it all off. Although it looks great so far! Attached are before and after photos of one coat.