Caulking Your Tub and Shower

Caulking the connection between your shower walls and tub prevents leaks and reduces mildew buildup. Removing old caulk and recaulking joints between tiles and your tub is an annual bathroom maintenance job.

If you have tile shower walls, there is a very good possibility that a leak could develop between the tile and the tub. As the house moves (a natural process that occurs in every home), a hairline crack can occur that allows water to get into the joint. Once water gets in, there is no telling how much damage can be done.

There's another good reason to recaulk. If you've tried to remove the black mildew stains from caulk, you know the blemishes are often unbudging. That's because the stains are often behind the caulk — between the caulk and the wall. The answer, of course, is to remove the caulk, kill the mildew, and then replace the caulk.

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Removing the caulk isn't as hard as it appears. One company makes a product called Caulk-Be-Gone and another makes an Adhesive & Caulk Remover, two commercial products that can assist you in the job. These products are specially formulated to soften caulk for easy removal.

After the caulk has softened (it may take a few hours), remove it with a plastic putty knife. Clean the joint with paint thinner and wipe the area dry with a clean rag.

Then clean the joint with this famous mildew cleaner:

1. Add 1 quart of liquid chlorine bleach to 3 quarts of warm water.

2. Add 1/3 cup of powdered laundry detergent.

3. Mix thoroughly and place in a spray bottle.

4. Spray the mixture onto the mildewed area. Let it sit until the black mildew turns white. Rinse with fresh water.

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Although this mixture is mild, don't forget to wear gloves and eye protection and make sure the area is well ventilated. Make sure the detergent you use is ammonia free. Mixing bleach with a solution containing ammonia can release a dangerous gas harmful to your lungs.

Immediately after eradicating the mildew, use a hair dryer or a hot air gun to thoroughly dry out the area. The joint can now be re-caulked.

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Use a roll of blue painter's masking tape for a professional-looking job. Apply the tape to the tub 1/8-inch from the joint. Next, apply another strip of tape along the wall, 1/8-inch from the joint. Now the caulking will go between the two pieces of tape, making straight, smooth lines.

Apply tub and tile caulk into the joint and smooth it with your finger, an old teaspoon, or a caulking spreader. Immediately remove the tape by pulling it out and away from the freshly caulked joint. Be careful not to touch the caulk. Let it dry. You simply won't believe how beautiful your job will look.

Comments (15)

  1. Posted by Santana
    Hi. Good site.
  2. Posted by Maureen
    How long after caulking do you have to wait to take a shower?
  3. Posted by Mimi
    at least 24 hours
  4. Posted by AmyP
    I had to re-re-caulk our shower recently b/c the caulk had pulled away from the tub and was leaking. Again. The culprit: the weight of the tub when we filled it for a bath. This time, I filled the bath halfway with water before I started caulking! So far, so good.
  5. Posted by Jeff
    Forget tape, take your finger, dip it in baby oil and smooth out the caulk. You end up with very professional looking results and no hassle of tape or cheesy tools that don't work as advertised.
  6. Posted by Pete
    Spay new caulk with Windex and smooth with your finger
  7. Posted by Angelo
    WOW < EXCELLENT INFO On how to caulk, who ever put this up needs a medal. First time caulking for 3 hours after reading this job turned out beautiful
  8. Posted by Mark
    Here's a tip to get the residual moisture out from between the tub and tile prior to caulking--canned air (the kind you use for cleaning electronics.) I've had a terrible time trying to recaulk my tub. I have only one bathroom in my house. My wife and I have two teen children. So there are four people--each on a different schedule. None of us wants to go 24 hours without a shower, and while my wife and I will make the sacrifice my teen children refuse to. Bottom line, I never get the job done right. What I'd like to see is a super-fast drying caulk that maintains its elasticity once it has cured. I guess you can't have the elasticity without the long cure time.
  9. Posted by Patricia
    The Caulk-B-Gone stuff was a time (and arm) saver! Plus once I'd read the warnings (absorbed by skin, causes cancer, yadayadayada) on that tube, I was prepared for the warnings on the caulking tube--> I wore latex gloves for both. This turned out great for the caulking part, as I used the back of my left hand as a place to wipe off the excess caulk from my right-hand fingers. And the tape idea was a worry-saver as well--I could be as messy as I needed to be with the smoothing out part and still wound up with crisp edges. Thank you, thank you, thank you!
  10. Posted by ravi
    please give me full info
  11. Posted by Mark
    Tape works great and provides clean lines. Make sure that you have a warm wet towel for your hands and newspaper to lay the caulk gun on to minimize the mess.
  12. Posted by Jonathan
    The best advice I saw on caulking was to push the gun forward as you caulk, not drag it.
  13. Posted by Chris
    I have a stand up shower and the caulking doesn't want to stick in the one corner where the water is always hitting from the shower head. Is there a super caulking out there that will put up with the constant water hitting it?
  14. Posted by Lisa
    I caulked around base of tub 24 hours ago, and it is still tacky. I used a Kitchen and Bath caulk that cures in 3 hours. Is tackiness normal. How long should the tackiness last? I don't want hairs and dust to get stuck in it. Thanks.
  15. Posted by Kellan
    quick tip! for easy cleanup of your hands, use a plastic shopping bag. it likes to stick to the bag a lot more than your hands so you put your hands in the bag, rub like you would with a rag and bingo...no more caulk on hands!

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