
How to Repair a Porcelain Toilet Crack
- Locate the Crack. Identify the crack that you want to repair. ...
- Shut Off the Water Supply. Shut off the water for the toilet. ...
- Flush the Tank. Flush the tank. ...
- Clean the Cracked Area. ...
- Drill Through the Porcelain. ...
- Widen the Crack. ...
- Fill the Crack With Epoxy. ...
- Sand the Cured Epoxy. ...
- Apply Resurface Finish. ...
- Drain the toilet tank. ...
- Dry out the tank with a cloth or a towel. ...
- Fill the crack with the putty or epoxy. ...
- Leave the epoxy to dry out for at least 24 hours. ...
- Make sure no cracks appear in the epoxy or the tank. ...
- Refill the tank with water.
How to repair a porcelain toilet crack?
Procedure:
- Clean the area around the crack to expose the full extent of the damage.
- At the farthest visible extent of the crack, use the dremel tool & diamond bit to drill a hole completely through the porcelain. ...
- Grind out a V or U-shaped valley along the entire length of the crack approximately 1/8″ deep x 1/8″ wide. ...
How to repair a cracked porcelain sink or bathtub?
Without the broken piece
- Clean and dry the area to be repaired. A simple household cleaner and rag will do fine.
- Cut off a portion of epoxy putty equivalent to what you think you’ll need, then begin kneading it in your hands while wearing a pair of latex gloves.
- Apply the putty and ensure it is flush with the surface, use a spackling knife.
How do you repair a crack in a toilet tank?
Required Supplies
- The very first thing you should do is turn off the water supply to the toilet. ...
- Next, flush the tank to remove any excess water and mop up any remaining water in the bowl and tank with some towels or sponges. ...
- Next, identify the cracks in the tank or bowl. ...
- Afterward, use the putty knife to smooth the sealant out. ...
How to repair a crack in the toilet tank?
Instructions
- Drain the Toilet Turn off the water supply to the toilet at the shutoff valve below the toilet tank. ...
- Clean and Sand the Repair Area Clean the area around the crack thoroughly to ensure there is nothing on the porcelain surface. ...
- Mix and Apply the Epoxy Mix the two parts of the epoxy (catalyst and resin) as directed by the manufacturer. ...

Can you fix a crack in a porcelain toilet?
Hairline cracks often can be patched with a porcelain epoxy. Larger cracks or cracks that penetrate fully through a bowl usually cannot be repaired, requiring that the toilet be replaced.
How do you fix a crack in a toilet bowl?
DirectionsTurn off the water supply to the toilet.Drain the tank of all water.Dry the tank until it's bone dry (both on the inside and outside).Apply plumber's putty or silicone sealant on the cracks.Wait the time recommended on the sealant manufacturer's instructions.Turn on the water supply to the toilet.More items...•
Can you fix a cracked toilet base?
Fixing the Cracked Toilet Hairline cracks normally do not require replacement if they are around the outside of the tank or bowl. If you see cracks like this, you should seal them with plumbing epoxy. Some cracks inside the tank can be repaired too, but they must be under 1/16-inch wide.
How do you fix a crack in a porcelain bowl?
You place your cracked piece in a pot and cover it with two cups of milk (or more if needed). Next, heat over low for an hour. Allow to cool in milk and then remove and rinse. Your piece, if the crack wasn't too far gone, should now have resealed itself!
Will silicone fix a cracked toilet?
Repairing a hairline crack involves using silicone plumbing epoxy on the inside of the tank. Drain the tank completely, using towels to remove all excess moisture. Let the toilet stand for a day or two with the lid off. The inside of the tank must be completely dry before applying the epoxy.
Will flex seal work on a cracked toilet tank?
Make sure the surface is clean and dry, then spray with Flex Seal. Allow the product to dry. This can take over 24 hours. You can use Flex Seal to fix leaks and cracks in your toilet tank.
What causes the base of a toilet to crack?
Cracks From Repairs: For example, fixing a broken component inside the tank and putting the lid back on the tank too hard can cause the toilet to crack around its top. Also, tightening bolts around the bottom of the toilet too tightly can cause the base of the toilet to crack.
Why would a porcelain toilet crack?
What causes toilet tank cracks. The most common causes of hairline cracks are impact, age, and accidents. While tanks are generally sturdy, an impact with a heavy object or a person can cause a small hairline crack that expands over time.
Can you glue porcelain toilet?
If you have a project that requires gap bonding or filling, surface repairs or laminating, the best glue for porcelain or ceramic repairs will be an epoxy. An epoxy consists of two parts: resin and hardener. When mixed together, they produce a durable, high strength bond.
How do you cover a hairline crack in porcelain?
Clean the entire sink thoroughly. ... Sand down the area directly around the crack with a medium-grain sandpaper. ... Create a solution using small amounts of the alkyd-based paint and the porcelain repair compound. ... Dip the tip of a single-edge razor blade into the mixture and slowly fill in the crack.More items...
How do you fix a hairline crack in a ceramic bowl?
How do you fix a hairline crack in a ceramic mug? Apply super glue to the crack and hold it in place for 1-2 minutes. If there's a small gap in the crack, press both sides together. Use the applicator tip of the super glue to apply the glue directly into the crack.
Can you fix cracked ceramic?
You need gap-filling adhesive/touch-up glaze, an emery board, and soap and water. Wash and dry chipped surfaces. Apply glue. Complying with the instructions in the product information, fill in chips or cracks and rebuild any lost material to protect the mug or object from further chipping.
What causes hairline cracks in toilet bowl?
A hairline crack outside of the tank or bowl may only be cosmetic and quite easy to repair, but a hairline crack inside the bowl or tank usually indicates that it has to be replaced. It's even more imperative to replace the toilet if there are multiple hairline cracks.
What would cause a toilet bowl to crack?
A toilet is a sensitive piece of equipment. It is made of porcelain and can crack or break very easily, and simple repairs are often the cause of a cracked toilet. For example, fixing a broken component inside the tank and putting the lid back on the tank too hard can cause the toilet to crack around its top.
How do you fix a ceramic toilet bowl?
How to Repair a Porcelain Toilet CrackStep 1: Locate the Crack. Identify the crack that you want to repair. ... Step 2: Shut Off the Water Supply. ... Step 3: Flush the Tank. ... Step 4: Clean the Cracked Area. ... Step 5: Drill Through the Porcelain. ... Step 6: Widen the Crack. ... Step 7: Fill the Crack With Epoxy. ... Step 8: Sand the Cured Epoxy.More items...
How do you glue a toilet bowl?
How to Glue Porcelain ToiletsClean the area between the break with a solution of dish soap and water to remove any grease or dirt. ... Spread a thin layer of craft bond cement or super glue along one surface, leaving the other clean.Press the two sections together and hold until the pieces bond. ... Wait 24 hours before use.
How to stop a hairline leak in a toilet?
If you have a hairline crack in the tank or the bowl, experts say you may be able to stop the leak by sealing the crack with waterproof epoxy. Epoxy can also be effective for cracks at the base of the toilet, such as cracks or breakage around the bolts that secure the toilet to the floor. Cracks under the water line in a toilet bowl are more ...
What does it mean when you find water in the toilet bowl?
If you find water on the floor near the toilet, a leak in the bowl is a possibility. Keep in mind that water may leak only occur when you flush the toilet, so flush while you check around the bowl for the crack that is causing the leak. Cracks in a toilet bowl can be difficult to identify, so it is a good idea to check for cracks on a regular basis.
How do you know if a toilet is cracked?
When the toilet crack is visible in the part of the bowl that retains water, you'll probably need to replace the toilet. An invisible crack is also a possibility, and it can be indicated by two different symptoms: standing water on the floor outside of the toilet, or missing water. Experts note that a small invisible leak can cause water ...
What to do if you spot a crack in your toilet tank?
If you spot a toilet crack in the tank, mark it and keep an eye on it to make sure it doesn't get any worse. It can be useful to take a picture of the crack for later comparison. A crack that is below the water level will have to be fixed. Unfortunately, a toilet tank crack can be hard to spot.
How to tell if toilet tank is cracked?
Finding Cracks in a Toilet Tank 1 A crack above the water level is usually not a problem unless the crack grows slowly. If you spot a toilet crack in the tank, mark it and keep an eye on it to make sure it doesn't get any worse. It can be useful to take a picture of the crack for later comparison. 2 A crack that is below the water level will have to be fixed. Unfortunately, a toilet tank crack can be hard to spot. If you suspect a leak from the toilet tank, start by checking the seals between the tank and the bowl. Next, check the tank carefully for a crack in the porcelain. You may have to look both on the outside and the inside of the tank to see it.
How to check for leaks in toilet?
Open the shutoff valve to the toilet by turning its handle all the way counterclockwise. Let the toilet tank refill, then flush the toilet and check for leaks.
Why is my toilet cracking?
A cracked toilet can be a perplexing plumbing problem because the cracks are not always easy to spot. In some cases, the crack may have occurred when the toilet was first manufactured but does not surface for many years. Other times, a toilet can mysteriously develop a crack at any time and start leaking. More obvious cracking can occur due ...
How to repair cracks in porcelain?
Drill a hole through the ceramic porcelain at the end of the crack. Wipe the surface frequently during the drilling, using a wet sponge. Water reduces dust, heat and friction near the grinding site.
What causes cracks in porcelain?
Water pressure, temperature and user weight can cause cracked ceramic porcelain to rupture. But, superficial cracks in the ceramic finish or a crack in a tank lid can be repaired with a rotary tool, a grinding bit, epoxy and meticulous care. Before making the repair, assess the depth, direction and location of any toilet crack.
How deep should a crack be for epoxy?
Grind a U-shaped channel with the diamond rotary bit along the length of the crack. The channel should be no more than 1/8 inch deep and 1/8 inch wide. Grinding a channel along the crack creates more surface area for the adhesion of epoxy.
How to smooth epoxy?
Sand the dried epoxy-filled surface with 60-grit sandpaper to remove ridges and air pockets. As the surface grows smoother with sanding, switch to 600-grit sandpaper. Continue sanding until the surface is level and smooth.
What is the easiest crack to repair?
Assess the depth of the crack. The easiest cracks to repair are straight, superficial and relatively short.
How to give a repair surface a glossy appearance?
To give the repair surface a glossy appearance, apply a clear finishing spray.
What to do before applying epoxy?
Wipe the surface free of dust and debris before applying epoxy.
What to do if your toilet base is cracked?
If the base is cracked, simply follow the exact same steps as listed above for fixing the tank and bowl. However, if the toilet base is leaking a lot of water out onto the floor, you will need to replace it.
How big is a crack in a toilet?
What is important to remember here is that if the crack in your toilet is larger than 1/16 of an inch, it may be best to just replace the damaged part instead of attempting to repair it. Anyway, let’s jump into the repair process.
How to dry out a toilet tank?
First thing’s first, turn the water off so that no more water can go into the tank. If need be, flush the toilet to drain the water out of the tank. You can also use towels, cups, or anything else at your disposal to dry out the tank .
What to use to fix cracks in a wall?
Use plumber’s putty, a silicone sealant, or a waterproof porcelain epoxy to fix the crack. If need be, you may need to apply the material from both sides.
Why is it so hard to fix a bowl?
That said, the hardest part to fix is the bowl, mainly because it always has water flowing through it, and sealant or putty will only last so long. Also, keep in mind that when cracks are under the waterline, they automatically become much harder to repair than cracks or splits that are above the waterline.
Can hairline cracks be fixed?
Moreover, the general rule of thumb here is that hairline cracks can all be fixed, whereas serious cracks, especially those that go all the way through from one side to another, should not be fixed. Instead, the affected components if you can source them or the entire toilet need to be replaced.
Do toilet sealants last long?
Moreover, even the best of sealants and repair agents will only last so long. Although you can make a repair, it might not last long, and you may end up needing a new toilet bowl anyway. Either way, the steps for fixing the bowl are virtually the same as for the tank.
Why does my toilet leak?
However, a toilet in a climate-controlled area can develop a leak because of a manufacturing defect, impact with the bowl, a poor repair, or simply from being an old bowl.
What to do if you have a tiny fracture in your toilet?
What does it take to repair a tiny fracture in the toilet? If the fracture is above the water line, you may choose to watch the fracture rather than to repair it immediately. Unless it is a severe crack or unless it could potentially cause a water leak, a watchful approach is always an option.
How long does epoxy cure?
Keep in mind that epoxy typically must be fully applied within 30 minutes or less after it is activated. After it is set, it generally must cure for approximately 24 hours.
How to repair cracks in epoxy?
Clean and Prepare the Surface . Once the area in question is dry, use sandpaper to scrape away the finish on and around the crack. You should only sand the area where the waterproof epoxy will be applied. Sand the surface until it is rough to the touch. Rinse away the dusty debris, and allow the surface to dry. 5.
What are the two parts of waterproof epoxy?
They override the application instructions here. Generally, however, the epoxy is sold in two parts, and these are the resin and the catalyst .
Why do you need a replacement toilet?
A replacement is also required if the toilet is too damaged to attempt to repair. With many styles and types of toilets to choose from, this is a wonderful opportunity to upgrade the style of your bathroom. A low-flow toilet may reduce water consumption as well.
What is a toilet bowl made of?
In most homes, toilet bowls and tanks are made out of porcelain. This heavy, durable material is designed to hold up to regular use for potentially decades. However, damage can occur over time, and it should be repaired promptly. In the event the damage is severe, however, a toilet replacement is often the better option.
Why is it hard to spot a crack in the toilet bowl?
Above Water Level Cracks. Above water level cracks can be hard to spot because they might not leak. If they are in a spot that is far enough away from water, you might be able to leave them alone for now, but keep an eye on them. Another symptom of a crack in the toilet bowl could be missing water from the tank or bowl.
How to tell if a toilet has a crack?
The easiest way to identify whether your toilet has a crack in it is the presence of pools of water on the floor near the toilet. Below Water Level Cracks. If a crack is below the water level, it will be fairly noticeable as you should be able to see the leak.
How to Tell if Your Toilet Bowl is Beyond Fixing?
If cracks are small enough, then they should not be too difficult to fix, and they should not greatly affect toilet performance. The larger a crack is, the harder it will be to repair and seal with epoxy.
Why does my toilet tank crack?
Toilet cracks can be caused by many things, but most commonly are a result of: The most common reason a toilet tank cracks is due to wear and tear from ageing. A modern toilet can last up to 50 years if maintained properly, but it will stick chip and crack from age over time.
Why are there cracks in my water tank?
Cracks that are below the water level in the tank will be very easy to spot because they will leak water onto the floors. These cracks are very serious and need to be taken care of immediately as they can leak dirty water on your floor. Above water level cracks in the bowl are more or less the same as in the tank.
How long does a toilet last?
A modern toilet can last up to 50 years if maintained properly, but it will stick chip and crack from age over time. Impacts with other hard objects like cabinets can also cause cracks in the toilet tank material.
What to do if your water tank is leaking?
2. Next, flush the tank to remove any excess water and mop up any remaining water in the bowl and tank with some towels or sponges.
Why is there a crack in my toilet bowl?
While it's apparent that you have identified a crack in your toilet bowl (probably caused by hitting the bowl hard with a toilet flange plunger), there might be other cracks you haven't spotted yet. Other than an openly visible crack, a toilet leak or mysterious water loss in the tank indicates cracks.
What Would Cause a Toilet Tank To Crack?
A toilet tank may crack because of several reasons, including the ones discussed below.
How long does a toilet tank last?
Although manufacturers and plumbers agree that the average toilet lasts as many as 50 years, toilet bowls and tanks are prone to cracking, which may necessitate replacements. The good news is that you don’t have to do a replacement if you know how to fix a cracked toilet tank. Fixing a cracked toilet tank doesn't have to be hard or as risky as some ...
How to seal a water tank with epoxy?
5.1 Step 1: Locate all the Cracks. 5.2 Step 2: Turn Off the Water. 5.3 Step 3: Dry Both on the Inside and Outside of the Tank. 5.4 Step 4: Apply the Waterproof Epoxy to the Cracked Area. 5.5 Step 5: Smooth Out the Seal er.
How long does epoxy need to dry before sealing?
Allow the applied epoxy or sealer to rest for 24-30 hours until it is completely dry. Then, use soft sandpaper to sand the surface lightly to smooth and remove any excess sealant.
Can you repair a hairline in a toilet tank?
You don’t even have to be a plumber to do a simple toilet tank repair. Nor do you need to call in a plumber.
Can you drop the lid of a toilet when replacing it?
Other times, you might drop the toilet tank lid when replacing it, causing the tank to break. Old age: Despite the 50-year durability guarantee on most toilets, age usually weakens them and may lead to a cracked toilet bowl or tank if you disturb the toilet excessively.
What adhesive is used to fix a cracked toilet base?
One appropriate adhesive choice for the cracked toilet base is two-part epoxy. Epoxy is a thermosetting resin that, mixed with a hardener, forms a tough bond that will keep the break sealed up. It will also be resistant to water, which is an obvious concern around a toilet. To ensure the epoxy that bonds with porcelain, ...
What happens if a toilet base is broken?
If the broken toilet base is not properly glued back together, when the base shifts under a user's weight, or when the toilet is otherwise moved due to the broken base, the seal created by the wax ring can easily be broken also. This allows both water and sewer gases into the room. The water can damage the flooring around the toilet, ...
How to bond epoxy to porcelain?
Advertisement. Wipe all debris and water off the toilet base using a clean, dry rag . Thoroughly stir and mix the epoxy, according to the instructions, apply generous amounts to both sides of the crack, join them ...
Can you use silicone caulk on a toilet?
Don't Use Silicone Caulk. Although you might initially consider silicone caulk to seal the broken toilet base, it won't provide the long-term success that epoxy and polyurethane glue provide. The advantage of epoxy is the bonding strength it provides. Yes, silicone caulk might both provide an adhesive seal against water leaking through the crack , ...
Can you glue a toilet base back together?
If the toilet base is not too damaged, you may be able glue it back together, but before you can do that, you'll probably have to widen the crack. Without doing that, there's no way to get the glue where you need it to go. Prepare for disappointment, because the porcelain could shatter into small pieces, and if that happens, ...
Can you fix a porcelain toilet?
Image Credit: belchonock/iStock/GettyImages. When you tighten the nuts onto the closet bolts that hold the base of a toilet secure, avoid over tightening or you can easily crack the porcelain toilet. It might not seem as bad as a crack to another toilet part, such as the tank, but it still can lead to leaking.
Is it safe to replace a cracked toilet?
Don't feel bad...that's what you probably should do anyway, because replacing a cracked toilet is safer than gluing it.
