How to Fix a Cracked Toilet Bowl in 4 Easy Steps

A crack on your toilet bowl can be a puzzling plumbing problem as they are always not easily noticeable. Such cracks may result from manufacturer defects taking years to surface. Others occur due to extreme temperature changes. Old toilet bowls are also prone to cracks at the slightest impact. Fortunately, repairing a cracked toilet bowl is a simple DIY project that may not require the services of a professional plumber.

cracked toilet bowl rather

Here’s how to fix a cracked toilet bowl. Turn off the toilet tank water supply. Flush the water inside the tank and the bowl. Clean and dry thoroughly. Roughen the cracked surface using sandpaper and rinse dry. Mix and apply your epoxy. Refill the tank to test.

Although most hairline cracks on a toilet bowl are easily repairable, you may need a new toilet for wider cracks. The article will cover how to find cracks on your toilet and a step-by-step guide on fixing them.

You’ll also learn of instances when you may need to replace the bowl with a new toilet.

Related: How to Fix A Cracked Toilet Tank

How To Find Cracks On a Toilet Bowl

Water on your bathroom floor could be a sign of a leaking bowl. Some cracks are thin, and water leakages may only occur when flushing the toilet. So, flush while checking closely to see the origin of the leakage.

A hairline crack on your toilet bowl may not be easy to identify. You can regularly check for cracks whenever you flush the toilet.

Here are possible outcomes you may notice.

A crack below the water level is usually challenging to locate due to the shape of a toilet bowl. Such cracks occurring on the bowl part holding water may require you to replace the toilet.

A crack above the toilet bowl water level may need some monitoring. If such a crack does not come in contact with water even when flushing, leave it alone.

However, you may need to check both sides of the crack and probably take a photo to help you track any change. Constant weight exerted on the toilet seat may widen it over time.

An Invisible crack has two symptoms—water standing on the bathroom floor or no water in the bowl at all. Expert plumbers note that tiny invisible leaks may cause stagnating water on the toilet base.

In rare scenarios, you’ll hardly notice any water on the floor as it will leak out into the toilet drain.

Step By Step Guide On How to Fix a Cracked Toilet Bowl

  • Below are the equipment and materials you’ll need to fix a crack on your toilet bowl.
  • Sponge and bucket
  • Putty knife
  • Waterproof epoxy
  • Sandpaper
  • Cleaning supplies

Note: Several types of adhesives, such as silicone sealant, may be used as an alternative to waterproof epoxy.

Step 1: Shut Off The Water Supply and Drain The Toilet

Turn the shutoff valve below the toilet tank in a clockwise direction until the water stops flowing in. Flush to empty the remaining water in the tank and the toilet bowl.

Using your sponge, soak all the remaining water in the toilet bowl and tank and wring it out into the bucket. Wipe the toilet porcelain dry.

Step 2: Clean, Sand, and Dry the Crack Area

cleaning the toilet area

Clean the crack surrounding, ensuring nothing is left on the porcelain surface. Use sandpaper to roughen the surface you want to apply the epoxy. Although waterproof epoxy can work on a wet surface, let it dry completely to enhance the strength of your epoxy adhesion.

Step 3: Mix and Apply the Waterproof Epoxy

waterproof epoxy

Follow the directions to mix the two parts of the epoxy—resin and catalyst. Using a putty knife, apply the mixture on the crack and smoothen for an even appearance. The epoxy should be applied approximately within the 30 minutes working time.

You can then leave it to cure overnight or as per the instructions.

Other alternatives to waterproof epoxy include polyurethane glue or silicone sealant. Follow the instructions on any adhesive you choose to use.

Step 4: Refill the Toilet Bowl and Test

Turn on your water supply allowing the toilet tank and the bowl to refill. Let it sit and inspect carefully for any leaks. You may then flush and keep monitoring for leaks. If you still notice leaks, repeat the process by applying more glue or opt for a toilet replacement.

Bottom Line

Learning how to fix a cracked toilet bowl is one of the easiest DIY projects that may only require you to buy glue and use other supplies around your home to accomplish.

Although you can easily seal cracks using adhesives, you may need a professional plumber to replace your toilet if leakages persist after several attempts to fix them.

Note that a cracked bowl with constant leakages on the bathroom floor can cause damages on the surrounding floor, which might be costly to repair in the long run. As a result, it’s crucial to repair it immediately after you notice the leakage.

People Also Ask

Many homesteads experience toilet leakages after some time of use. Below are common questions about leaking toilet bowls and how to manage the problem without engaging a professional plumber.

Can You Repair a Cracked Toilet Bowl?

A cracked toilet bowl is repairable and may not need special expertise or materials to fix. You may only need a waterproof adhesive plus a few supplies such as a spreader, bucket, and sponge. Follow the manufacturer’s instructions on the type of glue you choose to use.

What Causes a Toilet Bowl To Crack?

A toilet crack may result from several factors, including extreme temperatures or a manufacturer’s defect. Toilets may also develop cracks when hit by an object.

How Do You Fix a Cracked Porcelain Toilet?

Fixing a cracked porcelain toilet follows a simple procedure. First, shut off your toilet water supply and drain the toilet—next, clean, sand, and dry the repair region.

Apply silicone sealant or an epoxy mixture onto the crack and leave to cure as per manufacturer instructions. Open the shutoff valve and refill the tank and the bowl to test.

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