Learn How to Glue Granite Properly?

Granite is understandably one of the most sought-after materials for home renovation and construction. Besides being reliable and sturdy, it also holds a high aesthetic appeal for any household or office.

However, it’s not entirely immune to fissures and cracking; particularly, if not installed properly. From too-hot cookware to too-heavy weights or simply due to a case of weak granite, various factors can cause it to break.

So, what do you do if faced with cracked granite? Drilling is not an option as it might damage the granite. Fortunately, as long as you know how to glue granite, you can fix it. Buy yourself some special granite adhesive and refer to our instructional guide detailed for you below.

What Kind of Glue Do You Use for Granite?

Undoubtedly, epoxy is the best type of adhesive to use when attaching granite due to its great strength and reliable bonding power. Consequently, it’s also the most commonly used adhesive for granite.

Epoxy is made from a combination of hardeners and resins, which results in such a dependable structural glue that once it dries and is cured, it proves to be as strong as the granite itself.

You can also opt to use a urethane adhesive such as the Loctite PL 530 Construction Adhesive. Such glues are usually formulated using two different components, offer flexible use, and are typically quite good at resisting vibration and impact.

How to Glue Granite Properly

For some, another option is a silicone-based adhesive, but this is sometimes the wrong type of adhesive to use for the purpose. Although many installers prefer it, it’s not as dependable as epoxy resin unless it’s of very high quality.

The same goes for polyurethane construction glue, which is more suited to wood. If you do use polyurethane glue to attach granite, make sure that the two pieces being joined have a good, tight fit.

All that being said, if you’re dealing with a fissure instead of a crack, using epoxy is not a must. Whichever adhesive you choose, make sure to do your research properly.

How to Identify a Fissure in Granite?

The distinction between a crack and a fissure is quite easy to make; after all, a crack isn’t hard to miss. A fissure, on the other hand, is often not immediately visible or noticeable. Although fissures are natural, they can sometimes widen into cracks, so it’s important to identify them when they appear.

So, what is a fissure? It’s a very light, narrow opening or line in the granite that may or may not be visible. Typically, they’re not a cause for concern. If it’s too big, though, it can be an eyesore or even pose structural issues.

The easiest way to check whether it’s a fissure is to place pressure on one side and observe whether it expands or can be felt.

How to Glue Granite?

Once you have your selected granite adhesive handy, now it’s time to get to work. Here is our step-by-step guide on gluing granite.

What You’ll Need

  • Granite adhesive of your choice
  • Peroxide cleaner
  • Soft cloth
  • Work gloves
  • Masking tape
  • Clear tape
  • Mixing bowl
  • Stir stick
  • Razor blade
  • Sandpaper

Got everything you need? Let’s get started!

Step 1: Clean the granite pieces

Using a strong peroxide cleaner and a soft cloth, wipe down the points where the granite pieces will come together. This ensures that no debris or dust can interfere with the adhesion process, resulting in a durable bond. Let the cleaner dry for up to 30 minutes.

Ensure that there are no nearby exposed heat sources, as peroxide cleaners are flammable. And don’t forget the gloves!

Step 2: Secure with masking tape

The area of granite which you are repairing must be squared off using masking tape. This not only makes bonding easier but also reduces the need for sanding. Furthermore, the well created by the tape allows the adhesive to settle in easily instead of spreading.

Step 3: Prepare the granite adhesive mixture

As you may already know or have guessed by now, the vast majority of granite adhesives have two components: the hardener and the adhesive. It’s important to follow manufacturer instructions very cautiously when preparing the mixture; otherwise, you might end up with a weak attachment.

How to Glue Granite

When stirring in the hardener into the adhesive, work as quickly as possible to prevent the adhesive mixture from settling into the cup. This step requires close attention, so be careful.

Remember to wear work gloves when making the mixture!

Step 4: Apply the adhesive

Once your adhesive mixture is ready, use your stir stick to apply it to the fissure, chip, or crack in your granite. When doing this, the adhesive must be built slightly higher than the rest of the granite so that it can settle properly. Try not to take too long during this step, as the adhesive might harden prematurely.

Step 5: Join the pieces together

It’s the moment of truth! Lean in and use the strength of your arms to bring the two pieces together and join them. Don’t apply too much force or pressure; the adhesive will do its job.

Step 6: Immediately remove excess adhesive

Once you’ve finished gluing the granite together, you’ll probably notice excessive bits of adhesive protruding from between the old crack. Use your razor blade to gently scrape off this excess adhesive to prevent an eyesore.

Step 7: Apply clear tape

Now once you’re done scraping, grab your clear tape and gently smooth it over the repaired area in the granite. This further helps to level the adhesive out, allowing it to sit flush with the surrounding granite.

Then, allow about 15 minutes to 30 minutes for the adhesive to properly set (check the manufacturer’s instructions for the exact waiting time). Now remove the tape slowly.

Step 8: Clean and smoothen the granite

Using your peroxide cleaner, finish how you started by cleaning the granite. Then, with your sandpaper, smooth out the repair surface. When the adhesive has fully cured in a couple of weeks, you can choose to go over the repair surface with a granite color enhancer matching your countertop’s shade.

Final Words

We hope that our guide on how to glue granite has illuminated the process of repairing your granite. Quite evidently, it’s a process that requires time and patience, and a good bit of precision. So don’t be ashamed to pass the task onto a handyman, but also, we have full faith that you can do it!

Good luck!


  1. https://homeguides.sfgate.com/glue-granite-countertops-37901.html
  2. https://marble.com/articles/granite-adhesive
  3. https://homeguides.sfgate.com/fix-broken-piece-granite-72883.html

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