How to Maintain Caulk Around Your Bathtub

Maintain bathtub caulk by cleaning it weekly with mild cleaner, inspecting for cracks every few months, and recaulking when you notice gaps or discoloration.

1. Stop Mold Before It Starts. Spray the caulk with a mild bathroom cleaner or a mixture of equal parts water and white vinegar. Let it sit for 5 minutes, then scrub gently with an old toothbrush to remove soap scum and prevent mold buildup. Rinse thoroughly and dry with a clean cloth.
2. Catch Problems Early. Check the entire caulk line for cracks, gaps, or areas where the caulk has pulled away from the tub or wall. Look for black or green spots that indicate mold growth. Pay special attention to corners where water tends to collect.
3. Patch Before It Spreads. Fill minor cracks or gaps with a small bead of fresh caulk that matches your existing color. Smooth it with your finger and wipe away excess. For mold spots, scrub with a bleach solution (1 part bleach to 10 parts water) and let dry completely.
4. Strip Everything Old Away. When caulk becomes extensively cracked, moldy, or discolored, cut it out completely using a utility knife or caulk removal tool. Scrape away all residue and clean the surface with rubbing alcohol before applying new caulk.
5. Seal It Right This Time. Use 100% silicone caulk for bathtubs. Apply a steady, continuous bead along the joint, then smooth it with your finger dipped in soapy water. Remove excess immediately and let cure for 24 hours before using the tub.
6. Dry Out Your Bathroom. Run your bathroom fan during and for 30 minutes after each shower to reduce moisture that causes caulk to deteriorate. If you don't have a fan, crack a window or door to improve air circulation.