Skip to Content

How To Seal Grout: 4 Steps Included

A lot of people think that sealing the tile grout isn’t essential. But that’s wrong. Because if the grout isn’t sealed afterward, the grout will get dirty, discolored, and expire soon. This will just ruin your bathroom or kitchen’s aesthetic look. 

How to seal grout?

You need to select the perfect grout sealants for your grout first. The second step is to clean and dust the grout before sealing it. Don’t scrub your tile or seal it while it’s still wet. After cleaning and dusting your grout, it’s time to apply your chosen sealer and let it dry afterward. 

To properly seal the grout, you’ll need to learn more. For this reason, the many steps of the procedure have been described.

We hope you’ll continue to visit!

Is It Necessary to Seal The Grout?

Yes, sealing grout is a must. If you don’t seal your grout, you’re putting your grout at a risk.

Except for epoxy grouts, which do not need sealing, most grouts are highly porous. This is because there are significant differences between sanded and unsanded grout.  

If the pores aren’t sealed, they will absorb all the stains, dirt, and germs that fall on them.

As a result, your new grout will be discolored and destroyed!

Furthermore, since unsealed grout absorbs everything. Every time you clean unsealed grout, you’re making it worse. Reabsorbing the filthy water in the grout is liable for this!

How Do You Identify If Your Grout Requires Sealing?

If you are unsure if your grout has been sealed or not, you may conduct a simple test. Test a few drops of water on your grout to see whether they are absorbed. 

If water stays on the grout line and doesn’t get absorbed, your grout is sealed. Otherwise, you have to start sealing the grout. 

There are many types of grout sealers available. These products protect your grout against water, stains, mold, and mildew. But it also revitalizes the color of your grout, allowing it to match the tiles.

Here are a few suggestions regarding the best grout sealers-

Product 1
Product 2

Grab one and let’s get to work!

What Are The Precautions While Using Grout Sealer?

Before starting the work, you should know the grout sealer contains powerful chemicals. When applying the sealer, it’s preferable if pets and youngsters aren’t around. 

Wearing protective eyewear, a mask, and gloves is a good idea. You can use similar pair gloves that are worn while soldering your copper to brass threaded fittings.

Remember to ventilate the space by opening windows for several hours. 

How to Properly Seal Grout? [Step-by-Step]

The grout sealing procedure may be intimidating for some individuals. But it’s not that hard if you grasp the processes. You’ll need to set aside several hours if you’re sealing fresh new grout.

Tools Needed:

  • Gloves
  • Mask
  • Protective eye gear
  • Grout sealer applicator
  • Grout sealer

Let’s go for step by step instructions- 

Step-1: Select the Grout Sealant

Once you’ve decided to seal your grout, you’ll need to choose the appropriate sealer. That’s why we wanted to give you some ideas about some grout sealants-

Non-penetrating Grout Sealer

Non-penetrating grout sealants are all really simple to apply. It protects against mold, moisture, and grime. 

Non-penetrating sealants also have difficulty sticking to glazed tiles. That’s why I use them in low-traffic and low-moisture areas with natural or unfinished tiles. 

Unfortunately, you have to reuse them again in 1-2 years. This means it doesn’t provide long-lasting protection.

Penetrating Grout Sealer

You might want to protect your grout from stains and mold for a longer time. In that case, consider a penetrating grout sealer. This sealer penetrates the pores of the grout. They’re also providing additional protection for 3-5 years. 

Step-2: Clean and Prepare the Grout

Start with cleaning your grout. You should always clean thoroughly before sealing or re-sealing grout. Check for and fix cracks, holes, and broken seams in older grout. 

If you have pinholes in the grout, you should fix the pinholes in your grout. Because you don’t want to trap moisture or mold.

Remember, new tile projects need fully dry and cured grout before sealing. That’s why wipe off the area with a rag. Dry it thoroughly to avoid water dilution of your sealer. 

Step-3: Apply Grout Sealer

Once you have selected the sealant, it’s time to apply it. There are a few ways you can apply it. You may apply the sealer in three ways: brush, roll, or spray. 

Here are a few descriptions of these three methods. You can choose one of these. Such as-

Method-1: Brush On

The sealant should be applied with a brush tip straight to the grout. It’s best to avoid putting grout sealer on the tile itself, but a tiny amount won’t impact. Use a thin and pointed head brush to do this job.

Method-2: Roller

With rollers, you may keep going down the tile seam line. This way you’ll need little to no reapplication. But make sure, you’re not creating any mess. That’s why get a roller that’s made to seal the grout instead of a big paint roller. 

Method-3: Spray-On

The thought of laboriously using an applicator tip to follow the grout lines might make you nervous. If that’s the case, just apply it using a spray bottle.

Step-4: Allow it to dry

After applying the sealer, you need to give it time to dry. Before allowing the grout to get wet again, let the whole area dry thoroughly. Make sure you follow the drying time recommendations provided by the product’s manufacturer. Some grout sealers suggest waiting 24 to 48 hours.

By the way, your grout might look lighter than usual after the sealing process. In that case, use oil to darken the grout

That’s it! You can easily follow these steps to seal grout perfectly.


Question: When should grout be sealed?

Answer: The frequency of grout sealing is determined by the environment. For moist areas like the bathroom, seal your grout at least once a year.

Question: How many coats are necessary to apply on the grout sealer?

Answer: The number of layers of sealer required is determined by how porous the grout is. Another factor is if it has previously been sealed. In most cases, you’ll want to apply at least two coats of sealer.

Question: How long does grout sealer last?

Answer: The lifespan of a grout sealer varies depending on the sealant and the grout’s surroundings. In moist areas such as bathrooms, it is recommended to re-seal grout at least once a year.


Hopefully, you now feel assured about sealing grout yourself. If you aren’t, make sure to ask an expert to help you out.

Good luck with fixing the problem!