How to Re-Caulk a Bathtub or Shower (Remove Old Caulk & Grout)
Time required: 1-2 hours (plus 24 hr cure) · Difficulty 2/5
Failed caulk around a tub or shower is a leading cause of hidden water damage inside bathroom walls — some homeowner's insurance policies exclude gradual water-intrusion damage as a maintenance issue, so re-caulk as soon as you see cracking, gaps, or mold.
Est. DIY Parts: $15 - $25 · Pro Service: $150 - $280 · Est. Savings: $130 - $260
* Estimates based on regional/national contractor rate benchmarks. Actual part prices vary by brand and retailer.
Parts & Tools You'll Need
- 100% Silicone Kitchen & Bath Caulk (White or Clear)
- Caulk Remover Gel
- Mold-Killing Bathroom Cleaner
- Caulk Gun
- Utility Knife or Oscillating Tool
- Caulk Finishing Tool
Step-by-Step Manual
- Cut out and scrape the old caulk Score along both edges of the old caulk bead with a utility knife, then peel and scrape it away completely with a razor scraper.
- Apply caulk remover to stubborn residue Spread caulk remover gel over any remaining old caulk, let it dwell per the label, then scrape it clean.
- Treat and clean any mold Spray mold-killing cleaner along the joint and surrounding tile/grout, scrub, then rinse thoroughly and let the area dry completely (a few hours, or overnight).
- Mask the edges (optional but recommended) Apply painter's tape along both sides of the gap for a crisp, professional-looking caulk line.
- Apply a new, even bead of caulk Cut the caulk tube nozzle at a 45-degree angle and run a steady, continuous bead along the full length of the joint, holding the gun at a consistent angle.
- Smooth the bead and let it cure Smooth the caulk immediately with a finishing tool or a wet gloved finger, remove the tape while the caulk is still wet, and avoid using the tub/shower for at least 24 hours while it cures.