How to Caulk a Bathtub

Learn how to remove old caulk and apply a fresh waterproof seal to your bathtub with this simple step-by-step guide for a leak-free bathroom.

Plumbing

Tools Required (6)

Materials Needed (3)

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1.Slice through the old caulk along the wall and tub edges using a utility knife to loosen the bond.
2.Scrape away all remaining old caulk and residue using a putty knife or caulk removal tool until the surface is bare.
3.Clean the joint thoroughly with isopropyl alcohol and a clean rag to remove any soap scum or silicone residue.
4.Allow the area to dry completely for at least thirty minutes before applying new material.
5.Apply painter's tape along the wall and tub edges to ensure clean, straight lines.
6.Cut the tip of the caulk tube at a forty-five-degree angle to the desired bead width.
7.Load the tube into the caulk gun and apply a consistent bead of silicone along the joint.
8.Smooth the bead immediately using a caulk finishing tool or a gloved finger.
9.Remove the painter's tape carefully before the caulk begins to set.
10.Allow the caulk to cure fully according to the manufacturer's instructions before using the tub.