How to fix pinholes in new grout?

Author: Nikki O'Kon  |  Last update: Monday, April 27, 2026

For pinholes, you can simply dampen the grout and push new grout into the holes to do a quick patch. This method only works for small pinholes. Larger holes can mean more damage to the surrounding grout area. To fix larger grout holes in the shower, you need to dig out the old grout and replace it with new grout.

How to fix grout pinholes?

You have three options, first you can try to fill the holes with grout or silicone which is hard, messy and often leaves holes remaining. Second you can use a sealer and hopefully fill the holes or live with them. Third option is to removed the old grout and reapply new grout.

How do you fix pitted grout?

How Do You Repair Crumbling Grout?
  1. Remove Crumbling Grout. Use a grout saw, utility knife, or another removal tool. ...
  2. Mix Grout. Be sure to use the right type of grout for your needs. ...
  3. Apply Grout. Whether you're repairing shower grout or floor grout, it's important to fill gaps correctly. ...
  4. Wipe Away Residue. ...
  5. Seal the Grout.

How to fix bubble holes in grout?

Mix up some more grout, and use your finger to fill in the holes really well. Allow to set then wipe with a sponge. In the future, when doing grout, make sure you're applying it correctly by working it into the line at a 45 degree angle, then again using your float, press the line perpendicularly.

Can I use caulk to fill grout holes?

Yes, you can apply caulk for a temporary fix. That seam should be filled with a waterproof caulk, such as silicone, anyways, not grout. The caulk will give you a lifetime waterproof seal.

How to Repair Cracked and Worn Grout (Shower)

Can you fill holes in grout after it dries?

For pinholes, you can simply dampen the grout and push new grout into the holes to do a quick patch. This method only works for small pinholes. Larger holes can mean more damage to the surrounding grout area. To fix larger grout holes in the shower, you need to dig out the old grout and replace it with new grout.

Can I put silicone caulk over grout?

Yes, you can put silicone over grout. This ensures watertight sealing.

Are pinholes in grout normal?

Tiny pinholes develop over a period of time. This process is normal, as after some time, the foundation of the house sinks a teeny-weeny bit deeper into the soil, thereby shifting the structure of the house. Grout is a very delicate material as it is made from sand and cement.

Can you repair grout without removing it?

epoxy grout is a great choice when you are ready to re-grout a tile project. Because epoxy grout is so much stronger than other types of grout (particularly cement grout), you won't even need to remove all of your old grout. You can apply new grout right over the top of the old grout.

Can you fill in grout lines?

Spot repairing grout is not only possible, it's also a great way to fix cracked or crumbling grout lines. Simple remove the damaged grout, wipe down the area, prepare the new grout, then apply.

Can you put new grout on top of old grout?

You don't have to remove all of your old grout to apply the new grout. The new grout can be applied right over the top of the existing grout. You will need a grout removal tool, which is a small tool with a sharp blade capable of chipping away the grout.

Do grout pens work?

This really works! The grouting around the tiles in our kitchen and bathroom was looking very tried with several black damp spots. The grout pen covered it all in one coat and was very simple and quick to use. We added an extra coat on the very stained sections and now it all looks like fresh grouting.

Can I touch up grout the next day?

Generally, you should be okay to mix up some grout and touch up any trouble spots in your new grout. Stuff like pin holes, scratches or low spots can be touched up with fresh grout the next day. The trick is to blend in the new grout with the old so make sure you mix it the same way that you mixed it the day before.

Can you fix bad grouting?

If you've tried cleaning your grout and restoring it with a grout pen, but you're still unhappy with the look of the grout, the other option is to remove it and replace it with new grout. Check out our video with advice for re-grouting tiles.

Does grout lines need to be sealed?

While the tile industry does not require sealing, it is always recommended, especially in wet or high-traffic areas. Penetrating sealers are the most commonly used and offer high water, chemical and stain resistance. They provide protection without changing the appearance of the grout joint.

How do you patch grout?

Repairing Cracks with Grout
  1. Use a bamboo skewer and drag it along the grout line. ...
  2. Mix the new grout with water in a small container. ...
  3. Evenly spread the new grout over the damaged grout lines. ...
  4. Scrape any excess grout from the tiles using the edge of the grout float .
  5. Give the new grout about five minutes to sit.

Do I have to remove all old grout before regrouting?

It is highly recommended to remove your old and damaged grout before applying new grout. So, you are noticing that your grout seems to be separating, cracking, or crumbling? Often, when we look at what appear to be small issues with our home finishes, we jump to the Internet to search for repair solutions.

Do grout rakes work?

A dedicated grout rake or a Stanley blade is best for removing existing grout. Grout rakes can be both mechanical and electric. Any electric grout rake is usually 240V and has variable speeds. The Rubi Grout Remover helps to remove grout surrounding ceramic and porcelain tiles.

How to avoid pinholes in grout?

Make sure you press the grout against the tiles and gaps hard. This will make sure the grout goes in under some pressure.

How to fix grout bubbles?

Press Grout DOWN Into The Gaps

Otherwise, voids and bubbles will be left down in the gaps and get covered over with a superficial layer grout similar to how a thin layer of wind-driven snow and ice will sometimes form over a crevasse in a glacier.

What happens if you don't reseal grout?

Unsightly Grout Stains and Discoloration:

One of the most noticeable effects of neglected grout sealing is the gradual accumulation of stains and discoloration. Grout is porous by nature, which means it readily absorbs liquids, dirt, and debris.

Can you fill gaps in grout with caulk?

Caulk is a versatile material that can be used for a variety of purposes, including filling in gaps in your tile grout.

What is the best grout sealer?

  • Aqua Mix – Sealer's Choice Gold. Aqua Mix has been producing quality tiling solutions and problem solvers for over 30 years and I have been using their product for nearly as long. ...
  • Miracle Sealants – Porous Plus Sealer. ...
  • Black Diamond Coatings – Aqua-X Grout Sealer. ...
  • Tuff Duck Granite Grout Sealer.

How long after grouting can I apply silicone sealant?

We recommend waiting for at least 48 hours after installing a grout before you apply a sealer. Older grout should be cleaned thoroughly before being left to dry. Make sure to protect grout from spills and stains during this time, otherwise you'll be sealing in the dirt instead of keeping it out!

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