Your Guide to Toilet Crack Repair: Understand, Diagnose, and Fix It Yourself

Are you dealing with a cracked toilet and not sure what to do next? Don’t worry, we’ve got you covered. In this comprehensive guide, we’ll delve into the world of toilet crack repair, discussing the different types, causes, and what happens once a crack occurs.

Whether you’re a homeowner or a DIY enthusiast, understanding how to diagnose and repair a toilet crack can save you time, money, and the hassle of a full replacement. So, if you’re ready to tackle this common plumbing issue, read on to discover everything you need to know about toilet crack repair.

The Facts at a Glance

  • Understanding Toilet Cracks: – Different types of cracks in toilets – Causes of toilet cracks – Consequences of having a cracked toilet
  • Diagnosing a Toilet Crack: – How to identify cracks in toilet tanks – How to find cracks in toilet bowls
  • Repair or Replace: Making the Decision: – When to fix a cracked tank – Deciding whether to repair or replace a cracked toilet
  • How to Repair a Toilet Crack: – Preparing for the repair process – Required equipment and materials – Step-by-step instructions for repairing a crack in a toilet

toilet crack repair

Types of Cracks

As the sun begins its ascent, casting ethereal hues across the morning sky, the mundane task of tending to the porcelain throne takes an unexpected turn. The delicate balance of tranquility is disrupted by the unwelcome presence of toilet cracks. These insidious adversaries come in two forms, each with their own treacherous implications.

First, we encounter the elusive hairline cracks , stealthily lurking beneath the surface. These elusive fissures, as thin as a whisper, possess the power to unleash havoc if left unchecked. Like a thief in the night, they can cause leaks and water damage, silently eroding the very foundation of our sanctuary.

To ignore their existence is to invite catastrophe. Then, there are the structural cracks, bold and brazen in their appearance. These formidable adversaries, born from the tumultuous dance of temperature changes and the callous touch of human hands, demand our attention.

They stand as a stark reminder of the fragility of our porcelain companion, their presence a testament to the consequences of negligence. Yet, fear not, for there is a path to redemption. Through the practice of regular maintenance and tender care, we can shield our beloved toilet from the clutches of destruction.

A simple act of vigilance can save us from the impending doom that awaits those who turn a blind eye. And should we find ourselves face to face with these cracks, as tiny as they may be, we must not underestimate their potential for annihilation. In such dire circumstances, it is imperative to seek the aid of professionals who possess the knowledge and expertise to mend what has been broken or offer the solace of replacement.

Let us remember, dear reader, that the cracks we encounter may seem inconsequential, mere blemishes upon the porcelain canvas. Yet, they possess an insidious power, a power that can transform a haven of comfort into a realm of despair. May we tread carefully, for even the smallest crack has the capacity to shatter our world.

toilet crack repair

What Causes Cracks?

A small, unnoticed crack in a toilet can be a warning sign of something much more serious. Over time, these tiny cracks can grow and wreak havoc on your bathroom. Fluctuations in temperature can also play a role, causing the porcelain to expand and contract, further exacerbating the problem.

Poor installation or rough handling can also be culprits behind these cracks . To protect your bathroom and prevent potential disaster, it is essential to install your toilet correctly and handle it with caution. Don’t ignore those hairline cracks – address them promptly to avoid costly repairs and the dreaded toilet failure .

What Happens Once Cracked

A cracked toilet can bring about a myriad of problems. One immediate concern is the potential for leaks and water damage. Water can seep through the crack, causing havoc on the surrounding flooring and walls.

This can lead to costly repairs and even the growth of mold if not addressed promptly. Furthermore, cracks in the toilet can make it unstable and shaky, creating an uncomfortable and unsafe experience for anyone using it. No one wants to worry about their toilet shifting while in the midst of their business.

Perhaps the most disconcerting consequence of a cracked toilet is the risk of complete failure. Over time, cracks can worsen and eventually cause the toilet to break apart. This not only renders the toilet useless but also necessitates a pricey replacement.

To avoid these troublesome scenarios, it is vital to address any cracks in your toilet as soon as they appear. Whether it be a small hairline crack or a more significant structural crack, taking immediate action to repair or replace the toilet can save you from the headaches and expenses associated with a damaged bathroom fixture. So, when you spot a crack in your toilet, don’t hesitate – act swiftly to ensure the integrity and functionality of your essential household appliance.

toilet crack repair

Finding Cracks in a Toilet Tank

In the quest to uncover hidden flaws within a toilet tank, one must embark on a visual expedition, searching for any telltale signs of water leakage or unsettling discoloration. These subtle hints may point to the existence of a crack lurking beneath the surface. A trusty flashlight becomes an indispensable ally in this pursuit, illuminating the tank’s nooks and crannies, revealing the elusive hairline cracks that may otherwise evade detection.

For it is through this meticulous examination that the seeds of prevention are sown, safeguarding against future tribulations. Never underestimate the power of a thorough visual inspection , as it heralds the crucial first step towards addressing these treacherous cracks and restoring harmony to the realm of the toilet tank.

If you’re dealing with a cracked toilet, don’t panic! This video will show you a simple and cost-effective fix that doesn’t require a plumber. Say goodbye to leaks and hello to savings. Let’s get started!

YouTube video

Finding Cracks in a Toilet Bowl

A meticulous inspection of the toilet bowl is crucial to evaluate any damage and make decisions about repair or replacement. Start by examining the base for any visible cracks, ranging in size from tiny fractures to larger structural damage. Pay attention to any signs of water leakage or discoloration near the bowl, as these could indicate a crack that may weaken and destabilize it over time.

To thoroughly check for cracks , use a flashlight and magnifying glass to meticulously scrutinize the bowl’s surface. Look for hairline cracks that may not be easily visible to the naked eye. These small cracks can be indicative of underlying structural issues that should not be overlooked.

Detecting cracks in a toilet bowl is essential in determining the necessary actions to be taken. If any cracks are found, it is crucial to address them promptly to prevent further damage and potential water leaks. Consult a professional to assess whether repair is possible or if replacement is required.

If you’re dealing with a cracked toilet bowl, check out our article “Cracked Toilet Bowl” to learn how to fix it and avoid any messy situations.

toilet crack repair

When to Fix a Cracked Tank

When faced with a cracked tank, the choice between repair and replacement is of utmost importance. There are indicators that suggest a cracked tank can be fixed, such as hairline cracks that can be addressed with the right techniques. However, before making a decision, several factors must be taken into account.

First and foremost, the severity of the crack must be assessed. If it is minor and poses no threat to the tank’s structure, repair is likely an option. On the other hand, if the crack is extensive and has caused significant damage, it may be more cost-effective to replace the entire tank.

The age and condition of the toilet also play a crucial role in the decision-making process. If the toilet is already showing signs of wear and tear due to its age, investing in a new tank may be a more practical choice than attempting repairs. In some cases, complex tank repairs may require professional assistance.

If you are unsure about the extent of the damage or lack the necessary skills and tools, it is advisable to consult a professional plumber or technician who specializes in toilet repairs. Ultimately, the decision to fix or replace a cracked tank depends on the unique circumstances at hand. By considering signs of repairability, the overall condition of the toilet, and seeking expert advice when needed, you can make an informed decision that ensures the longevity and functionality of your toilet.

If you’re dealing with a cracked toilet tank, check out our guide on toilet tank crack repair to learn how to fix it and avoid any messy leaks.

toilet crack repair

Does It Need Repaired Or Replaced?

Making the decision between repairing or replacing a cracked toilet can be a challenging task. The first step is to carefully examine the crack and determine its severity. If it is a minor hairline crack, repairing it might be a viable option.

However, if the crack is more substantial and affects the structural integrity of the toilet, a replacement may be necessary. Another crucial factor to consider is the age and overall condition of the toilet. If the toilet is already old and worn out, it might be more practical and cost-effective to opt for a replacement rather than temporary repairs.

Seeking the advice of a professional plumber is always a wise move. They have the expertise to evaluate the condition of the toilet and provide valuable recommendations. Additionally, they can suggest repair options like porcelain sealers or epoxy, depending on the specific situation.

Ultimately, the decision should take into account the severity of the crack, the age of the toilet, and the guidance provided by a professional. By considering these factors, you can find the most suitable and cost-effective solution for your cracked toilet, ensuring durability and longevity in the process.

Fixing a Toilet Crack: Step-by-Step Guide

  1. Turn off the water supply to the toilet.
  2. Empty the tank by flushing the toilet and holding down the handle.
  3. Use a towel or sponge to dry out the tank completely.
  4. Clean the area around the crack with a mild detergent and rinse it thoroughly.
  5. Sand the repair area gently with fine-grit sandpaper to create a rough surface.
  6. Apply a porcelain sealer or epoxy to the crack, following the manufacturer’s instructions.
  7. Smooth out the sealer or epoxy with a putty knife or your finger.
  8. Allow the sealer or epoxy to dry completely, usually for at least 24 hours.

Before You Begin

Embarking on the journey of toilet repair requires careful preparation. As you delve into the task at hand, ensure the toilet is devoid of any remnants. Bid farewell to the water within, flushing it away, and remove any lingering items from the tank.

These preliminary steps will grant you unhindered access to the crack that awaits your attention, allowing you to conduct the necessary repairs with ease. Equally crucial is the gathering of tools and materials essential for the upcoming endeavor. Don your gloves, acquire sandpaper, and equip yourself with a porcelain sealer or epoxy.

With these elements at your disposal, you shall possess a formidable arsenal, ready to conquer the challenge that lies ahead. By having everything organized and within arm’s reach, you will effortlessly navigate through the repair process, unimpeded by any unforeseen hindrances. Yet, before you commence your repair odyssey, it is imperative to safeguard the surroundings.

Shield the area surrounding the toilet, for it is here that unforeseen drips and spills may occur. Lay down a protective canvas or plastic sheet, acting as a loyal sentinel against any potential damage that may befall your flooring or nearby surfaces. With this precautionary measure in place, you can embark upon your repair voyage without a lingering worry.

With an emptied toilet, a well-curated toolbox, and a shield to guard your surroundings, you stand prepared to embark upon the task at hand. These meticulous preparations shall serve as your guiding light, illuminating the path towards a successfully repaired toilet. As you navigate through the process, may your efforts be met with triumph, leaving your toilet crack-free and fully functional once more.

If you’re dealing with a cracked toilet tank, check out our article on how to repair a cracked toilet tank for some helpful tips and tricks to fix the issue and avoid any further damage.

toilet crack repair

Equipment / Tools

Having the necessary tools is vital when it comes to repairing a cracked toilet. Safety should always be a priority, so make sure to wear protective gloves and handle chemicals with care. Sandpaper will be needed to smooth out the repair area, while a porcelain sealer or epoxy is essential for a successful fix.

These materials guarantee a durable and long-lasting repair. So, equip yourself with the right tools and get ready to take on your toilet crack repair project while prioritizing safety.


Repairing a crack in your toilet requires the use of specific materials. There are various types of porcelain sealers available, each with its own unique properties. These sealers form a strong bond with the porcelain surface, ensuring a durable repair.

It is essential to prioritize safety by wearing protective gloves when handling the sealers. Some sealers contain harsh chemicals that can be harmful to the skin or cause health issues. By wearing gloves, you can safeguard your hands and ensure your well-being.

Additionally, sandpaper is necessary to smoothen the repair area before applying the sealer. The sanding process creates a clean and even surface, allowing the sealer to adhere effectively and produce a long-lasting repair. Remember, using the appropriate materials is vital for fixing a toilet crack.

Porcelain sealers , protective gloves, and sandpaper are all essential for a successful repair. Ensure you have these materials ready before initiating any toilet crack repair project.

toilet crack repair

Types of Toilet Cracks: Causes and Repair Methods (Tabelle)

Types of Toilet Cracks Causes Repair Methods
Hairline cracks – Ageing of the toilet material
– Temperature changes
– Wear and tear over time
– Use a high-quality porcelain filler or epoxy adhesive to seal the crack
– Apply a porcelain sealer specifically designed for toilets to ensure a waterproof repair
– Use a fine-grit sandpaper to smooth out the repaired area for a seamless finish
Chip or fracture cracks – Impact or forceful contact with a hard object
– Mishandling during installation or transportation
– Fill the chip or fracture with a durable porcelain filler or epoxy adhesive suitable for toilets
– Sand and smooth the repaired area to restore the toilet’s appearance
– Apply a porcelain sealer for added durability and protection
Structural cracks – Foundation settling or shifting
– Poor installation or manufacturing defects
– Assess the severity of the crack and consult a professional plumber for expert advice
– In some cases, the entire toilet may need to be replaced if the structural integrity is compromised
– Severe structural cracks may require professional repair or replacement by a qualified plumber to ensure safety and prevent further damage

Turning Off The Water

Before attempting any repairs on your toilet, it is essential to take the necessary steps to prevent water damage. Begin by locating the shut-off valve near the toilet and turning it clockwise until it is fully closed. By doing so, you can effectively minimize the chances of leaks and protect your bathroom from any additional harm.

Always remember to shut off the water supply before embarking on any toilet repairs to ensure a smooth and complication-free process.

Dry Out the Tank

To ensure a successful and long-lasting repair when fixing a cracked toilet, it is crucial to properly prepare the tank. Moisture can hinder the repair process, so follow these steps:

1. Begin by turning off the water supply to the toilet.

2. Flush the toilet to remove as much water as possible.

3. Use a towel or sponge to absorb any remaining water, paying close attention to corners and crevices.

4. Allow the tank to air dry for a few hours, ensuring all moisture evaporates.

5. This will create optimal conditions for the sealer to work effectively.

6. Remember, thorough drying of the tank is essential for a successful repair. By taking these steps and ensuring proper preparation, you can effectively fix the cracked toilet and prevent any further damage.

Clean and Sand the Repair Area

To achieve a successful toilet crack fix, meticulous preparation of the repair area is paramount. Before applying any sealer or epoxy, it is essential to thoroughly clean the area, ensuring optimal adhesion and a robust bond. This cleaning process also eliminates any dirt or debris that could compromise the repair.

Following the cleaning process, sanding becomes imperative to create a flawless surface. By eliminating any rough edges or imperfections, the sealer or epoxy can adhere seamlessly, guaranteeing a durable and resilient repair. While cleaning and sanding may appear to be minor tasks, they play a pivotal role in achieving a successful repair.

By dedicating time and attention to properly preparing the area, you lay the groundwork for a steadfast and dependable fix. Do not overlook this crucial step; your toilet crack deserves the utmost care and consideration.

toilet crack repair

Did you know that the average lifespan of a toilet is about 25 years? However, if a toilet crack goes unnoticed or unrepaired, it can significantly reduce its lifespan.


My name is Warren and I am a professional plumber licensed and insured in the State of California. I have been in the business for over 10 years and have undertaken small and large projects including bathroom renovation, toilets, garbage disposals, faucets, sinks and kitchen plumbing jobs. This site is based on my experience with toilets. I have installed the best brands and models in all sizes and shapes. I hope this helps you with the unbiased information that you need to make the right decision.


Find a Porcelain Sealer or Use Epoxy

When faced with a cracked toilet, one must make a crucial decision: porcelain sealer or epoxy? Fortunately, there are specialized sealers designed specifically for toilet crack repair. These sealers offer a robust and enduring solution, ensuring your toilet remains in optimal working condition.

To guarantee a successful repair, it is essential to apply the sealer or epoxy correctly. Start by thoroughly cleaning and drying the cracked area to ensure optimal adhesion and effectiveness. Then, meticulously adhere to the manufacturer’s application instructions.

The choice between porcelain sealer and epoxy hinges on the severity of the crack. For minor hairline cracks, a porcelain sealer may suffice. However, larger or more severe cracks may necessitate epoxy for a stronger and more long-lasting repair.

Regardless of your chosen solution, it is imperative to invest ample time and attentively follow the instructions. A meticulous repair will not only prevent further damage but also guarantee the longevity of your toilet. So, find the ideal porcelain sealer or epoxy for your specific needs and restore your toilet to its pristine condition.

Mix and Apply the Epoxy

Repairing a cracked toilet is no small task. It requires precision in mixing and applying epoxy, ensuring that it is evenly distributed and forms a strong bond. To start, carefully follow the manufacturer’s instructions for mixing the epoxy, making sure it is thoroughly blended.

Then, apply the epoxy smoothly and evenly over the crack, ensuring that it covers the entire area to prevent any future leakage or damage. Patience is key here, as you must allow the epoxy to fully cure before testing the toilet’s functionality. Be sure to follow the manufacturer’s instructions for the recommended curing time.

By taking these steps, you can effectively repair the crack in your toilet and restore its full functionality.

toilet crack repair

Smooth Out the Sealer

In the pursuit of a robust and enduring repair for your toilet crack, the application of sealer must be approached with precision. The secret lies in the even distribution of the sealer, ensuring that every inch of the crack is enveloped, leaving no room for weakness or gaps. Take your time, dear reader, and let your hand be steady as you embark on this task, for a flawlessly seamless finish awaits.

But let us not forget the importance of time, for it is a wise companion in this endeavor. Impatience, alas, can be our downfall, leading to a frail bond and an incomplete sealing of the crack. Instead, let us heed the guidance of the manufacturer’s instructions, allowing the sealer ample time to dry and solidify.

Only then shall we bear witness to the finest results, crafted by the hands of patience and precision. And oh, the rewards that await us! A properly smoothed and dried sealer shall stand as our stalwart shield, warding off any future leaks or harm.

So, dear reader, embrace the virtue of patience, distribute the sealer evenly, and let it embrace the entirety of the crack. In doing so, you shall forge a repair that shall stand the test of time, ensuring the continued functionality of your toilet for many years to come.

How to Identify and Repair Toilet Cracks: A Comprehensive Guide

  • Toilet cracks can be caused by a variety of factors, including age, improper installation, and excessive pressure.
  • There are two main types of toilet cracks: cracks in the tank and cracks in the bowl.
  • If left unrepaired, toilet cracks can lead to leaks, water damage, and even structural issues in your bathroom.
  • When diagnosing a toilet crack, carefully inspect the tank and bowl for any visible cracks or signs of damage.

Let it Dry

Properly drying your toilet crack is crucial for a lasting repair. Follow the manufacturer’s instructions for drying time, as it can vary depending on the product. Allowing the sealer to fully cure ensures a strong and effective seal.

Don’t rush the process, as this can compromise the repair and lead to future issues. Be patient and wait until the sealer has fully dried before using the toilet to prevent any potential damage or recurrence of the crack. By taking your time, you’ll ensure a successful repair and prolong the lifespan of your toilet.

Enjoy the peace of mind of a fully functional and dependable toilet once more.

toilet crack repair

Refill the Toilet and Test

Once you have successfully repaired your cracked toilet, it is crucial to perform a series of tests to ensure its proper functioning. Begin by turning on the water supply and allowing the tank to fill up. While it fills, carefully observe the water flow and listen attentively for any peculiar sounds.

Once the tank is full, take the plunge and flush the toilet. Observe its smooth operation and pay close attention to any signs of leakage or water damage around the base. Should you discover any pooling water or dampness, promptly address the issue to prevent further harm.

Next, ascertain the stability of the repaired toilet by conducting a gentle rocking motion while seated upon it. A stable toilet will remain steadfast, while an unstable one may require further attention. Lastly, subject the toilet to a series of multiple flushes to gauge its functionality.

Take note of the speed at which the bowl refills and be vigilant for any unusual noises. A properly repaired toilet should operate flawlessly without any hiccups. By meticulously following these steps, you can rest assured that your repaired toilet is in optimal condition and ready for use.

Remember to maintain regular upkeep to prevent future cracks and preserve the longevity of your bathroom fixture.

1/2 Final Thoughts

Maintaining your toilet regularly is essential to prevent cracks and ensure its longevity. By staying proactive and regularly checking for any issues, you can address them before they become major problems. This includes inspecting for hairline cracks, as they could indicate underlying structural issues that may worsen over time.

When it comes to repairing toilet cracks , it is advisable to seek professional help. While DIY repairs may seem tempting, a trained technician has the expertise to assess the situation and find effective solutions. By entrusting the repair to a professional, you can have confidence that it will be done correctly and efficiently.

Proper storage and careful handling are also crucial in preventing cracks during installation. Take care while transporting and installing the toilet to avoid any rough handling that could cause damage. Additionally, store the toilet in a secure location to prevent accidental impacts or shifts that may lead to cracks.

By understanding the significance of regular maintenance, seeking professional assistance for repairs, and practicing proper storage and handling, you can keep your toilet in excellent condition and avoid costly cracks. These preventative measures will not only prolong the life of your toilet but also ensure a functional and safe bathroom environment for years to come.

toilet crack repair


In conclusion, understanding toilet cracks and knowing how to diagnose and repair them is essential for maintaining a functional bathroom. This article has provided a comprehensive guide on the different types of toilet cracks, their causes, and the steps to repair them. By following these instructions, readers can save money by fixing minor cracks rather than replacing the entire toilet.

However, it is important to note that severe cracks may require a replacement . Overall, this article has equipped readers with the knowledge and skills needed to address toilet crack issues effectively. For more helpful articles on bathroom maintenance and repairs, we recommend exploring our website’s extensive collection of plumbing-related topics.


How do you fix cracked porcelain?

When it comes to repairing broken pieces, it’s important to choose a reliable adhesive that dries clear. Loctite Super Glue Gel Control is a fantastic option as it creates strong bonds with porous surfaces such as porcelain, and it doesn’t require clamping during the setting process. This super glue is specifically designed for fixing broken porcelain, making it an ideal choice for your repair needs.

What can I use to seal a cracked toilet?

To repair a cracked porcelain surface, you can follow these steps. Firstly, select a suitable sealer for the job. You have the option of using an epoxy sealer, which can be easily found at Home Depot for an affordable price. Alternatively, any porcelain sealer will also work effectively. However, it is advisable to consult plumbing experts to confirm if the specific branded sealer you choose is a good choice. Once you have obtained the appropriate sealer, you can proceed with the repair process.

Why is my toilet cracking?

If you try to fix a broken part inside the toilet tank and forcefully put the lid back on, it can result in cracks forming around the top of the toilet. Similarly, if you tighten the bolts around the bottom of the toilet excessively, it may cause the base of the toilet to crack. These are common issues that can arise from improper handling or maintenance of your toilet.

Can you fix a crack in a toilet?

Hairline cracks on the exterior of the tank or bowl usually do not necessitate replacement. Instead, you can effectively address these cracks by sealing them with plumbing epoxy. Additionally, it is possible to repair certain cracks that are found inside the tank, as long as they are smaller than 1/16-inch in width. Take a thorough look at all the cracks to determine the appropriate course of action.

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