See how simple the process really is. Then I used a toothbrush to spread the color evenly along the joint with a scrubbing motion and working in small sections. Polyblend Grout Colors Chart Grout Color Tile Grout Color Polyblend Grout Colors Generally a second coat may be applied after 30 minutes. How to recolor grout . Some homeowners also tint their grout with acrylic paint before applying it. Remove the old grout with tools such as an electric multi-tool fitted with a tile blade or a manual. If the area is dirty to start with be sure to sweep up any large crumbs first with a broom or brush. Repeat as necessary then rinse and dry. See what my thoughts were towards the end of the video. Be sure to rinse thoroughly with clean water. Changing grout colors light to dark or dark to light may require an extra application. To avoid the mess you can paint the surface of the grout with a grout colorant Colorants are made to match just about any stock grout color availabl...