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Can You Caulk Over Grout in a Shower? (Read This First!)

If you notice cracks in grouts in your shower, you’re probably looking for a solution. In case you’re wondering if you can caulk over grout in a shower? Or what alternatives are present, then you are in the right place. 

Today we will be discussing all caulking over grout in the shower.

Can you caulk over grout in a shower?

You can caulk over grout in a shower. Although, caulking over grout in a shower is not a good option. It can lead up to mold between layers. Although it is an affordable and easy hack, it’s not recommended. So, you would not want to caulk over grout in a shower.  

When you notice cracks, the first thing that will hit your mind is to cover them up with more grout. But, that is not enough. 

In case silicone caulk is used for the bathroom, it will not bond well with the grout. In fact, it will result in peeling in between caulk and grout. Therefore, the risk of growing mold and mildew increases. 

The best solution would be to remove old grout in the shower and refill them with silicone caulk. This will give you a professional, long-lasting seal.   

The first thing to do before you use caulk over grout is to choose the right type of caulk. Although, it is not a great option as the color difference will be visible, and mold growth can be caused.

However, the color difference will be so different that it will be way prominent to ignore. Although, caulking prevents the grouts from cracking. 

A wrong mixture with the grout material may end up causing cracks. This happens way more frequently than you think. Re-grouting can be an option. Otherwise, you can always go with caulking.

So, if you are wondering if you need to caulk over grout in the shower, the answer is simple. You can caulk it if you think you need to. It’s always a personal preference.

Is it ok to caulk over grout?

It is okay to caulk over the grout, but it is not a great idea. Unfortunately, caulking over grout is a temporary solution. The caulk forms a weak bond along with porous grout. 

However, after a few months or years, the caulk will end up peeling off. Mold will form in between the grout and the caulk. This mold will end up spreading on your shower walls, even behind the tile installations.

This will end up causing damage to your house. Although, if you are planning on replacing the grout connecting with the bathtub and the floor or filling the space between two tiles, the best deal is to regrout it.

Caulking over the grout also has some practical advantages. Suppose there are gaps created around the switchboard in your bathroom. You can use caulk around the switchboard to fill it up. This will fill the gap and help the switchboard in place.     

Will caulking stick to sealed grout?

Caulk will stick to sealed grout, but there may be some issues. Although, if you choose to use silicone grout, the job gets easier.

As adheres are considered a better material for caulks, they can be a great choice.   

Caulking should often be done after the messy process of grouting process. If caulking is done before grouting the shower, it has its own disadvantages. 

Once the caulking is done, it is better to re-check the grout to ensure it’s sealed well. Check if water flows or beads from grout, then you can be ensured that the grout is well-sealed.

It is a bad sign if the grout changes color, gets darkened, and absorbs water. This means the grout hasn’t been sealed well.

Grout is porous and tends to absorb liquid. So, after caulking the grout, the caulk may stick if it is done right.

Three reasons why you cannot caulk over grout in the shower – What happens when you caulk over grout?

What happens when you caulk over grout is the caulk can peel off after a certain time. Caulking is just a temporary fix for a cracked grout.

It would be best if you were extra careful when it comes to caulking the grouts. Theoretically, if caulking over the grout is not done properly it can form mold as it’s exposed to moisture. This can lead up to an allergic reaction. 

Caulking can lead up to many issues; here are some reasons why you cannot caulk over grout in the shower :

Will degrade quickly: 

Caulking might seem like an effective, simple, and easy solution. But, sooner or later, it comes off. However, you can use it if you want a temporary solution for water leaks.         

Will infest mold and mildew:

With time mold and mildew will grow between tiles. As soon as you notice mold on the caulk, it’s time to replace the caulk. There is no use in trying to clean the caulk if it has already started molding.  

Damage walls:

Damaged walls are another reason behind it; you cannot caulk over grout in) 0lppthe shower. The molds inside the tiles can spread and cause damage to the bathroom walls.

How do you seal cracks in shower grout? How to caulk over grout?

There are certain things you can do to seal cracks in shower grout. The following given steps are those you can follow to seal cracks in shower grout:

Removing old grout:

First things first, remove the old grout that has been cracked. The old grout that is loose and easy to move can remove by grout.

And for the other pieces, you can use a grout saw and or a Dremel tool. Once you’re done cleaning the old grout, you can vacuum to clean up the remaining dust. 

Before adding a new layer of grout, it is always good to remove as much grout as possible. If this is not done, the new layer will not bond properly.

Color-matching new grout:

The next thing to do is, find a replacement that is as close as the original colored grout. You can do this by taking an old piece of grout to a home improvement store.    

Applying new grout:

Once you have found the ideal colored grout, you need to re-apply the grout. You can scoop the grout with a spackle tool or your fingers and apply it to the area. Wipe off any excess surrounding the tiles.

Be sure to wear gloves before putting your fingers in the grout.  

Leaving it to dry:

Whether you are regrouting the walls or the floor, be sure to let it dry before it comes to any contact with water. Drying time can vary, but it usually takes 48 hours to cure the grout completely.

Following are the steps you can follow to caulk over grout:

Removing old grout:

Removing the old grout is the first thing before applying the caulk. Use a grout saw to remove all the grout.  

Bleaching and cleaning grout: 

If you plan on going over the old grout, vacuum the grout to remove the remaining dust off the grout. Use bleach to clean the grout to have a clean surface to work with.

Applying caulk using caulk machine:

You can also apply caulk using a caulk machine, to do so use a caulk machine and caulk all along the existing line and apply some pressure to the caulk machine. Smooth it out for a firmer connection.

Can you Regrout over the old grout shower?

You can regrout over the old grout shower. You can regrout over the old grout. It isn’t always necessary to remove the old grout before replacing it with the new one.

The good thing about regrouting is that it saves you money and time. You’ll have to do less work, and when you apply new grout over the old one, it uses less grout.

To apply grout, you will need a grout removal tool. Epoxy grout is a great option when it comes to reapplying the grout. For reapplying the grout, scrape off 2 mm of grout.

It’s better to work in small sections and fill the space you have scraped. Before applying any high-quality sealant, let the grout cure well.      

Final Thoughts

You can caulk over grout in a shower, but it is not recommended. Caulking over grout in a shower can lead up to various issues, including forming mold and debris. This can lead to damaging your walls if the caulk keeps absorbing water. However, this mold can end up causing allergic reactions too.