How to Replace Bathtub Caulk

Re-caulking a bathtub is not something that regularly appears on our to-do lists. However, if caulk is not properly maintained, water can leak into cracks and damage the wall or floor. In addition, mold and mildew can build-up in areas without caulk, causing a potentially hazardous health situation. Removing old caulk is not a particularly difficult task. However, it does require a number of steps to do a good job. The right tools, a steady hand and patience will add to your success and keep your tub and shower properly sealed.

Things You'll Need

• Caulk remover Utility knife or razor blade Putty knife Silicone caulk Caulk gun Bowl Bleach Water Cotton swab Rubber gloves Painter's tape

Instructions

1. Use a utility knife or razor blade to remove the old caulk from the tub. Run the blade between the caulk and the side of the tub or tile.

2. Peel the caulk out of the gap. You may need to use a putty knife to get into the cracks.

3. Use caulk remover on areas that are difficult to remove. In addition, spread the remover in seam of tub and let it sit for an hour or so (or as directed on the package) to ensure that all the residue is removed.

4. Use a putty knife to scrape the remaining caulk from the gap.

5. Clean seams that will be re-caulked thoroughly. Use a cotton swab and a small bowl of bleach diluted in water (two parts bleach to four parts water) to remove any mold or mildew that might have formed in the cracks. Allow the area to dry thoroughly.

6. Read the directions that accompany the caulk thoroughly before using it.

7. Apply painter's tape 1/8 to 1/4-inch from both sides of the gap that will be filled with caulk.

8. Place a caulk tube in the caulking gun. Using utility knife, cut tip at a 45-degree angle. Start in a corner of the tub. Gently and evenly squeeze the trigger on the caulk gun. Move the tip at a steady pace along the crack to fill it.

9. Put on rubber gloves. Wet the tip of your finger with a little water and glide it over the caulk bead to smooth it down, remove air bubbles and fill the crack thoroughly.

10. Wait five to ten minutes for the caulk to set up. Remove the painter's tape by peeling it away from the caulk to reduce smudges and dents.

Tips & Warnings

• If you find there is water under the old caulk, allow the area dry overnight before re-caulking. Using a hair dryer might speed the process a bit. Examine caulk at least once a year to ensure it is still in good shape. Re-caulk as soon as caulking appears worn, mildewed or is cracking or peeling away from surface. Be sure the caulk you purchase is for kitchen and baths. These are specially formulated to resist mildew. To create a wider gap between the tub and tile, fill tub with water before caulking.

• Do not use tub or shower for at least 24 hours after caulking.