Review on Waterproof Brown Grout Pen Marker: Tile Grout Colorant and Sealer with 5mm Narrow Tip (7mL) by Robert Aan

I bought a large brown grout stick. I was very pleased. Came quickly, there were no leaks. I have a large grout at my entrance and this pin size works well. The brown has a reddish undertone which is great for me. I cleaned the tiles and grout and wiped dry. I started at the farthest corner and worked my way back to my corridor. I swiped the marker from left to right, then quickly moved right to left to cover all of the grout. I used my bare finger (the gloves were too uncomfortable) to push the paint into the joints, especially in the corners. I used dry paper towels to quickly wipe the excess off the tiles. Immediately afterwards I used a damp cloth. You have a few minutes to wipe off the excess - not long. I waited about 24 hours to apply sealant to the tiles and grout. It's been over 48 hours and I love the color and the improved grout. It was easy to clean. I threw away the damp cloth. I washed my hands thoroughly only once and my hands became clean. I am planning and going dark gray to make my bathroom. I would buy this product again. If I have problems I will try to update. Update 06/23/2019 I'm very happy with how the mortar looks today. I don't think it has faded or changed color. I recommend this product and would buy it again.