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How to caulk a tub and shower

Caulking is the icing on the cake, but its purpose is certainly not only decorative. It's the last step in your shower installation to make sure no water gets through and causes mold.

Quick Tip

For areas prone to water damage, use 100% silicone caulk.

A diagram showcasing how to caulk a tub.

A person using a caulking gun to caulk the corner in a shower tile installation.Once the grout has cured, you can finally address those movement joints at the intersections of walls, around fixtures, above the tub surround and at the shower base.

We recommend the use of TEC® Skill Set Silicone Caulk, but to ensure matching, it’s best to use a caulk from the same manufacturer and same color as your grout. Note that 100% silicone caulk is required at base of shower between floor and wall.

Your movement joints must be completely dry before beginning to caulk. Otherwise, the caulking will not stick. Using a caulking gun, squeeze a thin bead of tub-and-tile caulk, the same color as the grout, into your movement joints. Aim to install enough caulking to completely fill the joint without over-filling and making a mess. When the joint has been filled, smooth it with a wet finger or putty knife. Wipe away excess caulk.

TEC® Skill Set Silicone Caulk and caulking guns are available at Lowe's home improvement centers.

Our diy Expert

Ron Sheldon

Ron Sheldon is a tile and floor installation guru. He has far too much knowledge on obscure topics like grout and floor leveling. A passionate tile contractor by trade, Ron’s spent the past decade dedicated to educating people about tiling, and has great advice on how to perfect your project.

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