How To Fix A Cracked Porcelain Sink

Have you ever looked down at your kitchen sink and noticed a crack or chip in the porcelain? It can be a frustrating and unsightly problem, but don’t worry, you don’t have to replace the entire sink.

With the right tools and materials, you can easily fix a cracked porcelain sink yourself. In this article, we will guide you through the process of:

  • Assessing the damage
  • Gathering the necessary materials
  • Preparing the surface
  • Applying the filler
  • Sanding and smoothing
  • Applying the glaze
  • Finishing touches

By following these steps, you’ll have your porcelain sink looking as good as new in no time. So, let’s get started!

Assessing the Damage

It’s important to take a deep breath and evaluate the extent of the damage before diving into any repairs. Assessing the damage is crucial in determining the best course of action.

First, you need to identify the cause of the cracking. Porcelain sink cracks can occur due to a variety of reasons, such as impact damage, thermal shock, or natural wear and tear.

Once you’ve identified the cause of the crack, you can then determine whether to tackle the repair on your own or seek professional help. Depending on the extent of the damage, repairing a porcelain sink can be a complex and challenging task. If you’re not confident in your DIY skills or the damage is severe, it’s best to leave the job to a professional.

In any case, it’s always a good idea to do your research and seek expert advice before attempting any repairs.

Gathering the Necessary Materials

You’ll need to gather up all the tools of the trade to get this show on the road and make sure you have everything but the kitchen sink.

Before you start fixing your cracked porcelain sink, make sure you have the following materials ready and at your disposal:

  • Epoxy or porcelain repair kit: This will be used to fill the cracks and hold the sink together.
  • Sandpaper: You’ll need to sand down the surface of the sink to make sure the epoxy or porcelain repair kit adheres well.
  • A putty knife or scraper: This will be used to apply the epoxy or porcelain repair kit.

If you’re considering hiring a professional to repair your cracked porcelain sink, keep in mind that it can be quite costly. The cost of repairing a sink can range from $150 to $500 depending on the extent of the damage. However, if you’re willing to take on the challenge yourself, you can save a significant amount of money and complete the repair at a fraction of the cost.

When it comes to repairing a cracked porcelain sink, there are eco-friendly and sustainable options available. For example, you can opt for a porcelain repair kit that is free of harmful chemicals and made from natural materials. Additionally, instead of using sandpaper, you can use a natural pumice stone to sand down the surface of the sink. By choosing these sustainable options, you can ensure that your repair is not only cost-effective but also environmentally friendly.

Preparing the Surface

Before getting started, make sure to properly prepare the surface to ensure that your repair will be smooth and seamless, leaving you feeling confident and accomplished.

First, clean the area around the crack with a gentle cleaning agent or a mixture of baking soda and water. Avoid using harsh chemicals or abrasive materials that can further damage the porcelain surface. Rinse the area thoroughly with water and allow it to dry completely.

Next, apply a porcelain repair compound or epoxy to the crack using a putty knife or similar tool. Be sure to follow the manufacturer’s instructions carefully, as different products may have different application methods and drying times.

Once the repair compound has been applied, use a wet finger or cloth to smooth out the surface and remove any excess material. Allow the repair compound to dry completely before using the sink again.

Remember to follow all safety precautions, such as wearing gloves and protective eyewear, when handling the repair compound.

Applying the Filler

Now that you’ve properly prepared the surface, it’s time to fill the void with a porcelain repair compound or epoxy. Make sure to choose a product that matches the color of your sink as closely as possible. If you can’t find an exact match, you can blend colors to create a better match.

Mix the compound according to the manufacturer’s instructions, and apply it to the crack using a putty knife or a similar tool. Make sure to fill the crack completely, and smooth out any excess compound with the putty knife.

After applying the filler, let it dry completely. Drying time can vary depending on the product used, so make sure to check the instructions for specific drying times. Once the compound is dry, use a fine-grit sandpaper to smooth out any rough spots or excess filler.

If necessary, apply another layer of filler and repeat the drying and sanding process until the surface is smooth and level with the rest of the sink. Once you’re satisfied with the repair, clean the area thoroughly and allow it to dry before using the sink again.

Sanding and Smoothing

To achieve a polished and seamless finish on your surface, it’s essential to sand and smooth out any rough patches or excess material left over from the filler application.

Start by using sanding techniques, such as wet sanding or dry sanding, depending on your preference. Wet sanding involves using water to lubricate the surface and prevent the sandpaper from clogging, while dry sanding uses sandpaper without any additional lubrication.

When sanding, use smoothing tools, such as sandpaper, sanding blocks, or a rotary tool with a sanding attachment, to gently buff away any rough edges or bumps. Be sure to sand in a circular motion, applying even pressure to avoid creating any additional cracks or damage to the porcelain.

Once you’ve sanded down any excess material, wipe the surface clean with a damp cloth and let it dry completely before moving on to the next step.

With patience and a steady hand, you can achieve a perfectly smooth and flawless finish on your cracked porcelain sink.

Applying the Glaze

Get ready to transform your damaged surface into a stunning work of art with the final step of applying the glaze. Before you begin, make sure you choose the right type of glaze for your porcelain sink. There are several options available in the market, such as spray-on, brush-on, or roll-on glaze. Choose the one that suits your needs and preferences the most.

Once you have selected the glaze, it’s time to apply it to your sink. The most common mistake people make when applying the glaze is not following the manufacturer’s instructions. It’s crucial to read the instructions carefully and follow them precisely. Most glazes need to be applied in thin layers and require a specific drying time between coats.

Also, make sure you apply the glaze evenly over the entire surface and avoid leaving any bubbles or streaks. Once you have applied the first coat, let it dry completely before applying the second coat. Repeat the process until you achieve the desired finish. With a little patience and effort, your porcelain sink will look as good as new in no time.

Finishing Touches

You’re almost done restoring your damaged bathroom fixture, just a few finishing touches will make it shine like a diamond in the rough.

The final step is to polish the glaze to achieve a smooth and shiny finish. There are several polishing techniques you can use, such as using a soft cloth or a polishing compound. However, you need to be careful not to apply too much pressure, as this can damage the glaze.

Start with a small amount of polishing compound and gently rub it onto the surface of the sink in circular motions. Keep polishing until the surface is smooth and shiny.

Once you’ve finished polishing, the last step is to make sure the color matches the rest of the sink. If you used a colored glaze, it’s important to make sure it matches the original color of the sink.

You can use a color matching kit to find the closest match. Apply the color matching product to the affected area and let it dry completely. If the color is slightly off, you can repeat the process until you achieve the desired result.

With these simple finishing touches, your porcelain sink will look as good as new, and you can enjoy your restored bathroom fixture for years to come.

Frequently Asked Questions

Can a porcelain sink be repaired without replacing it?

Repairing a cracked porcelain sink is possible without having to replace it entirely. There are various repair methods available to fix the crack, such as using an epoxy or porcelain repair kit.

These kits are cost-effective when compared to the cost of replacing a sink, and they can restore the sink’s original appearance. However, it’s important to note that the repaired area may not be as strong as the rest of the sink, which could lead to future cracks.

Weighing the cost comparison and considering the severity of the crack will help you determine if repairing the sink is the best option for you.

Is it safe to use a cracked porcelain sink?

If you have a cracked porcelain sink, it’s not safe to use.

The cracks can harbor bacteria and lead to water damage in your home.

While there are repairing options available, it’s important to note that there are also dangers involved.

DIY repairs can often lead to further damage or injury, especially if you don’t have experience with porcelain sink repair.

It’s best to consult with a professional to determine the best course of action for your specific situation.

How long does it take for the filler to dry before sanding?

When applying filler to a cracked porcelain sink, it’s important to know the drying time before sanding. The drying time can vary depending on the type of filler used and the application technique. Generally, it can take anywhere from 30 minutes to a few hours for the filler to fully dry.

It’s important to follow the manufacturer’s instructions and allow enough time for the filler to dry before sanding. If the filler is still wet when sanded, it can cause further damage to the sink. Applying the filler in thin layers and allowing each layer to dry completely can also help speed up the drying time.

Can I use regular paint for the glaze instead of porcelain-specific paint?

Oh sure, go ahead and use regular paint for your porcelain sink. I mean, who needs all those fancy painting techniques and surface preparation steps anyway?

It’s not like porcelain is a delicate and finicky material that requires special care or anything. And why bother with porcelain-specific paint when you can just use whatever’s lying around in your garage?

I’m sure it’ll turn out just fine. Except, you know, it won’t.

If you want to actually fix your cracked porcelain sink and not just make it worse, you need to use the right materials and techniques. That means doing your research, following the proper surface preparation steps, and using porcelain-specific paint that’s designed to withstand the unique challenges of this particular material.

Trust us, it’s worth it in the long run.

How often do cracks in porcelain sinks typically occur?

Cracks in porcelain sinks can occur due to a variety of causes such as sudden impacts, thermal shock, or even improper installation. However, prevention is key to avoid such cracks from happening.

Always make sure to handle your sink with care, avoid placing heavy objects on it, and use caution when pouring hot water. Additionally, make sure your sink is installed correctly with proper support to avoid any unnecessary stress on the material.

By following these preventive measures, you can significantly reduce the likelihood of cracks occurring in your porcelain sink.


Congratulations, you’ve successfully fixed your cracked porcelain sink! By following the steps outlined in this article, you’ve saved yourself the hassle and expense of replacing your sink.

Not only will your sink look as good as new, but it’ll also function properly without leaks or other issues.

Now, you may be thinking, “But won’t the repair be noticeable?” While it’s true that the repair area may be slightly different in texture and color than the rest of the sink, with proper sanding and glazing techniques, the repair can be virtually undetectable.

Plus, it’s a small price to pay for a fully functioning sink that doesn’t need to be replaced.

Remember, fixing a cracked porcelain sink is a task that requires patience, attention to detail, and the right materials. But with the steps outlined in this article, you can confidently tackle this project and enjoy the benefits of a fully functional sink without having to spend a fortune on a replacement.

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