Place blue painter s tape on either side of the existing caulk line and avoid using metal tools to help protect the surface of the tub from scratches.
Tool to remove grout around tub.
Work slowly image 3.
Remove the grout from between the pieces of tile with a grout scraper using the incision as a starting point.
Using a plastic razor made for auto detailing or a triangular carbide grout removal tool remove the existing caulk.
Clean the surface using alcohol.
Insert the triangular tip of the grout scraper into the incision you made with the grout saw.
Cut away the grout.
Using a small putty knife toothbrush and or the hook end of a 5 in 1 painter s tool see picture below scrape any remaining bits of caulk lose this step too requires a bit of patience.
The second type of manual grout removal tool features a carbide grit edged blade that s why it s.
The blade is harder than the grout and will cut it away image 1.
For much larger areas use a rotary tool image 2.
Instead of repurposing an existing power tool to remove grout this multi purpose option is meant to tackle many of the tasks of tile and bathroom construction such as grout removal sanding scraping and sawing.
The gmt15a is genesis s take on a do it all type of tool that will reduce the amount of time you spend reaching for separate tools.
Choose the tools you can use either manual tools or power tools to remove grout.
Others prefer to use a proessional grout saw or the sharp end of a utility knife.
You pull the tool through a grout joint until at least one eighth of an inch has been removed.
Many people use a razor blade for this purpose though you must be careful not to scratch the tub.
For small areas use a grout removal tool with a carbide blade.
Apply firm pressure and drag the scraper along the grout line about the length of one tile but be very careful to avoid scraping the tile.
Then kill any mold or mildew with a mixture of 1 3 cup bleach to 1 gallon of water.
A bathroom is a very small space with limited.
Make sure the bit is the right size for the space between the tiles and adjust the bit to the proper depth.
A grout saw with a carbine.