I was told to regrout my shower. I was wondering if there is an alterative to it. I was thinking of using caulk

For grout, I was thinking of using pre-mixed grout such as "SimpleGrout" which is avaliable at HomeDepot.

Any thoughts?



2 Answers 2


Any type of filler other than grout shouldn't be used to fill the joints between tiles. You will need an approved cement-type grout either sanded or not. Sanded is called for when grout joints are wider than 1/8- 3/16 inches.

You can also use a two part epoxy-type grout which is more durable and mold resistant, but is much less forgiving to use.

Any caulk or silicone won't last very long in a wet environment and is difficult to apply to just the joints.

Re-grouting entails removing any cracked or damaged grout with a grout saw or similar tool. By hand it is a tedious and slow job. There are power tools with attachments for grout removal that will shorten the work, but attention needs to be had in order to not damage the tile.

Once grout is removed from the affected area and the debris vacuumed out new grout can be troweled into the joints. It is easiest to color match the grout if there is grout left over from before. A similar color from the store may not match exactly.

Seal with an appropriate grout sealer when dried and before using the shower. (1-2 days).

  • Novices should avoid epoxy. I don't trust the OP to chisel out the grout and not damage the tile; use non-sanded in the crack, as is. +1
    – Mazura
    Jan 30, 2021 at 3:29
  • Just so I understand: Don't use caulk. I will use a manual grout removal tool to remove the grout and sweep it up. Then use unsanded grout. Can you recommend a brand? There are too many to choose -- There is Polyblend from Homedepot and Red Devil from Amazon. Jan 30, 2021 at 16:25
  • @NinjaGaiden-exactly correct. I have never used the Red Devil grout, but have had great success with the Polyblend. Invest in a margin trowel and a rubber grout trowel. Use grout sealer (any brand). Have towels and grout sponges on hand for final clean-up and haze removal.
    – ojait
    Jan 30, 2021 at 16:36
  • I was going to use my finger instead of getting a trowel. The crack is small. Should I still get a trowel? Jan 30, 2021 at 17:35
  • Be careful with you finger, the edge can be sharp. I once cut my finger doing exactly what you are proposing.
    – Mattman944
    Jan 31, 2021 at 0:36

If the grout in the corners has cracked, it will most likely crack again if you re-grout the corners. You must have a very slight amount of movement between the walls and the floor. Grout has no flexibility.

The grout is not a water barrier, so you don't need to do anything unless you are bothered by the looks.

I would caulk the corners only with a color that looks good. Use something made for wet areas that is mildew resistant.

Note that this recommendation is for the corners only. Never use caulk on the flat areas.

  • Thanks. It will be in the corners (the black area high lighted in the photo). From other responses, I am thinking of using unsanded grout. But, now I am also thinking I should use Silicone caulk. But from Ojait response it seems it won't last long. I am confused Jan 30, 2021 at 16:33
  • You could try to re-grout it. It it cracks again then try caulk.
    – Mattman944
    Jan 31, 2021 at 0:34

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