Tub & Shower Caulk Line
Bathroom · Moderate
The flexible silicone seal where tub meets wall and floor. Cracked or black-spotted caulk lets water rot the wall behind tile — refresh it early.
Replacement cost
$3–$10
Typical lifespan
3 yrs
Maintenance
every 3 months
Tools you may need
- Caulk gun
- Caulk removal tool or utility knife
- Isopropyl alcohol
- Painter's tape
Steps
- Cut out all old caulk and scrape the channel clean.
- Kill any mold residue with a mild bleach solution, then dry fully.
- Tape both edges, lay a consistent bead, and tool it smooth with a wet finger.
- Remove tape immediately and keep the joint dry for 24-48h.
Maintenance
Inspect quarterly for cracks or black spots; re-caulk at first failure. (Suggested interval: every 3 months.)
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