My shower/tub area was completely tiled, including a bench area in the back. The house-flipper did not seal the grout in any way. I’ve heard you typically caulk where the tub and tile grout meet, but what about this bench area

Should I seal with 511 the entire bench and then caulk at the seam? What about the vertical portion?

enter image description here.

  • Do you know how or whether they used a wet membrane? If they used kerdi correctly, for example, no caulking is necessary. If they didn't use a membrane then no caulking might ever suffice.
    – Matthew
    Commented May 10, 2022 at 22:14
  • Matthew D, if you do decide to caulk, use a tiny bead. Trim the end of the tube minimally and at an angle to create a natural tool. Press firmly.
    – isherwood
    Commented May 11, 2022 at 20:06

1 Answer 1


I caulk all corners in the tile. This is a place where grout often cracks and caulking has some elasticity so it helps alleviate that.

So yes- vertical, horizontal, bench, tile to tub or shower pan, basically every corner. I have not used silicone for years for this. Silicone looks good for awhile but then seems to get mold or mildew forming under it and usually looks pretty bad in a few years. I use the caulking sold by the grout manufacturer that matches the grout color in either sanded or un-sanded depending on which grout was used.

  • I'd agree on the "caulk the corners" part, but not so much on the product recommendation. When I redid my tub surround 25+ years ago, I used whatever was the cheapest caulk (I was cheap back then). I don't remember if it was an acrylic, latex, silicone, "tub & tile" or what, but I didn't have any more or less issue with mold/mildew on the caulking than anywhere else in the bathroom. And whatever it was that I used lasted just fine until last summer when I pulled it for a refresh. Of course, a color-matched caulk would probably look better...
    – FreeMan
    Commented May 11, 2022 at 12:10
  • 1
    Silicon | Silicone
    – isherwood
    Commented May 11, 2022 at 20:04
  • haha- thanks- right you are ! gotta laugh at myself sometimes...
    – Kyle
    Commented May 12, 2022 at 4:09

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.