First of all, what great value for money in the sense that I am the result of my work from amateur to could change professional! If I sealed before using my fingers as a finishing tool, the result was always a bit off. Tools allow you to make a stronger bead as it is not concave. Leaves a cleaner surface with little mess to clean up. Tilting the tool slightly will slide it along the vertical grout line so the roller doesn't sink into each of the grout lines. Much better than duct tape because it leaves a small border for bacteria to grow on.
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