How to Recaulk a Bathtub

If you are seeing a mildew build-up on your bathtub or if some seals have been damaged, one of the things you will have to do to solve this problem is to re-caulk the bathtub.

Re-caulking a bathtub is a fairly easy task and does not take more than an hour. Furthermore, the things you will need are fairly inexpensive and readily available; some of them at a bathroom supply store while others at home.

Things Required:

– Tile caulk
– Caulk softener
– Putty knife
– 5-in-1 tool
– Rubbing alcohol
– Caulking gun
– Utility knife
– Pencil eraser


  • 1

    In order to loosen up old caulk so that it can be replaced, apply caulk softener and let it sit for about 2 hours. When the old caulk is fairly loose, remove it with a putty knife or 5-in-1 tool.

  • 2

    To prevent mildew formation, clean the work area with rubbing-alcohol. Be sure to remove all soap residues and allow enough time for the work area to dry completely.

  • 3

    To ensure strength of the seals, completely fill the bathtub with water.

  • 4

    Load tile caulk in a caulking gun. Cut the tip of the gun at an angle of 45 degrees.

  • 5

    Start caulking one of the short walls. Make sure you keep the gun moving at constant speed while it is being squeezed. Move the gun in a direction opposite to which the gun is pointing. You may need to use a paper towel to clean excess caulk between applications. To prevent pooling, release pressure on the caulking gun as a corner approaches. Caulk along all other walls in a similar manner.

  • 6

    When you are done caulking the bathtub, smooth out the silicone line by running a wet finger over it and thus remove excess caulk as well.

  • 7

    Allow enough time for caulk to dry completely.

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