1. First, remove the damaged caulking with a utility knife by cutting at the very edge where the caulking meets the surface. Then pull it away with your hand. Remove any excess by scraping with the utility knife or small putty knife.
2. Clean the area well. Use a little bit of bleach and a scrub brush, this will prevent mildew and mold from coming back quickly.
3. Dry the area thoroughly. Let it dry for at least a couple of hours before you begin.
4. You will apply the caulk directly out of the container or caulking gun. Start by cutting off the tip of the tube after you take off the cap. Cut off just a little. There should be a mark on the tube itself, but just in case there is not, only cut off a little less than ¼ inch. Apply the caulk directly to the replacement area as a thick bead (or line), starting in the corner or at one end. Squeeze the tube slowly so that you leave an even, solid line behind you as you go.
5. Once you have a line of caulk along the replacement area, run your finger (wet it first so it doesn’t stick) along the bead, which will even out the caulking. You can also do this with a caulking tool, but I say save the money and use what God gave you.
6. Take a clean finger or paper towel and wipe up any excess caulk, including any that may have blended out too far.
7. Let it dry for 24—48 hours before using the tub or shower.
TIP: When you go to buy caulking, make sure that you don’t skimp. Spend the couple of extra dollars and purchase a good caulking. It will last longer and provide a better moisture barrier.
In order to be sure that you’re caulking won’t crack or stretch unnecessarily, fill the tub with water before you caulk, making sure that you don’t splash any water up into the caulking area. Caulk with the tub full. The water will provide the necessary weight to position the tub where it settles when you use it on a daily basis. Leave the tub full of water until the caulking is completely dry (twenty-four to forty-eight hours).