best gasket for wall mounted toilet
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Best Gasket for Wall Mounted Toilet [IN 2024]

A wall mounted toilet is installed directly onto the wall rather than sitting on the floor. The removal of the toilet base provides more open floor space and also makes cleaning easier.

However, one challenge with wall mounted toilets is properly sealing them to prevent leaks. This is where choosing the right toilet gasket comes in. The gasket fits between the toilet and the drain flange to create a watertight seal.

Picking an inappropriate toilet gasket can lead to leaks and water damage over time. So it’s important to understand the different types of gaskets available and choose the best one for your specific toilet model and installation.

Best Gaskets for Wall Mounted Toilets Reviews

After considering the above factors, here are top gasket recommendations:

Fluidmaster Wax Ring

Fluidmaster’s basic wax ring gasket is affordable and seals well for standard installations. The wax coating helps seal uneven flange surfaces.


  • Inexpensive
  • Easy to install
  • Seals most standard toilets


  • Wax can dry out over time
  • Not as durable long-term
  • Mess if wax seal leaks

Additional Review: This wax ring fits a variety of different toilets and is easy to install. It may not be as durable as some other options with long-term use, but works well for the price.

Sani Seal Toilet Gasket

The Sani Seal Gasket is a reliable foam gasket option. It seals tightly while staying pliable and resistant to compression or cracking.


  • Tight seal
  • Stays pliable
  • Resists compression


  • More expensive than wax
  • Possible over-compression
  • Not for sloped subfloors

Additional Review: I used the Sani Seal with my Toto wall hung toilet and it created a perfect seal. The foam conforms well to slight slope variances. It’s held up great after a year without any leakage issues.

Korky Wax Free Toilet Seal

This innovative hybrid gasket from Korky combines a sturdy rubber gasket with flexible foam. Excellent performance without messy wax.


  • No wax mess
  • Durable rubber and foam
  • Maintains seal with removal


  • Higher cost
  • Requires very flat finish
  • Rubber can be inflexible

Additional Review: The Korky Wax-Free Seal fits securely over the flange horn and prevents leaks even when the toilet is frequently removed for cleaning. I like that there’s no wax to make a sticky mess.

Johni Seal Toilet Gasket

The Johni Seal uses a unique toilet seal technology combining rubber and foam without a plastic horn. Suitable for 3” and 4” waste lines.


  • Combo rubber and foam seal
  • No plastic horn
  • Works on 3″ or 4″ pipes


  • On the expensive side
  • Rubber can be inflexible
  • Foam may compress over time

Additional Review: This gasket sealed my new wall mounted toilet perfectly. I like the flexibility of the rubber inner seal and foam skirt. The Johni Seal was easy to position and install.

Types of Toilet Gaskets

There are three main types of gaskets used for wall mounted toilets:

Wax Ring Gaskets

Wax ring gaskets are the most traditional option. They consist of a plastic horn that fits into the toilet drain hole with a ring of pliable wax coating the bottom.


  • Inexpensive
  • Easy to install
  • Seals well for standard installations


  • Wax can dry out or crack over time
  • Not as durable with frequent removal/re-installation
  • Messy if wax ring breaks or leaks

Foam Gaskets

Foam gaskets utilize compressed foam instead of wax to create the seal. Some are made entirely of foam while others feature a plastic horn with foam collar.


  • No wax mess
  • Maintain flexibility longer than wax
  • Good for small drain flange deviations


  • Cost more than wax rings
  • Foam may compress too much
  • Not ideal for subfloor with greater slope

Rubber Gaskets

Rubber gaskets are made of a flexible elastomeric rubber material. They are sleek, durable gaskets without extra horns or wax.


  • Long lifespan without drying out
  • No wax drips or mess
  • Maintain seal with toilet removal/reinstall


  • Require extremely flat finish subfloor
  • Most expensive gasket option
  • Not forgiving with flange height issues

Factors to Consider When Choosing a Toilet Gasket

Choosing the optimum gasket involves taking a few key factors into account:

gasket for wall mounted toilet
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Toilet Model

Consider details like the toilet bowl shape, drain opening position, weight, bolt pattern, etc. The gasket must match up precisely to seal properly. Measure carefully when replacing an existing gasket.

Drain Pipe Material and Size

Know details about the drain pipe material (cast iron, PVC, etc.) and outer diameter to choose a gasket that will make a snug fit. An extra-deep horn may be needed for larger pipes.

Ease of Installation

Opt for a gasket style that you can install confidently yourself if choosing a DIY project. Wax ring gaskets generally require less precision compared to foam or rubber gaskets.


Factor in longevity if accessing the gasket area after installation is difficult. Openly accessible toilets allow simpler future gasket changes compared to snugly fitted virtually inaccessible installations.

Proper Installation

Once you have the ideal toilet gasket, follow these key installation steps:

Prepare the Flange

Make sure the floor flange height meets toilet specifications. Grind down or use flange extenders if needed. Clean away old wax, bolts, etc.

Install the Gasket

Place the gasket evenly over the flange oriented as per instructions. Apply even pressure so it forms a tight uniform seal all around.

Mount the Toilet

Lower toilet straight down without sliding to maintain gasket position. Hand tighten bolts evenly on both sides before final tightening.

Caulk Base of Toilet

Apply quality waterproof caulk around the base of the toilet to seal it to the wall. Smooth neatly with caulk tool.


Here are answers to some frequently asked questions about gaskets for wall mounted toilets:

Do all wall mounted toilets need a gasket?

Yes, all wall mounted toilets require some type of gasket or seal between the toilet and the drain pipe in order to prevent leaks. Unlike floor-mounted toilets that use the weight of the porcelain to compress a wax ring, wall mounted options don’t have that vertical pressure. The gasket fills the space and makes an impermeable seal.

How do I know if my toilet gasket needs replacing?

Signs that your toilet gasket needs replacing include any evidence of moisture or leaks around the base of the toilet, foul odors coming from the toilet drain, loose toilet stability, visible corrosion on hardware, and periodic running or phantom flushing. Replacing the gasket every 8-10 years is also a good preventative measure.

Can I install the toilet without a gasket?

It is never advised to install a wall mounted toilet without some type of gasket. While you may get away without leaks initially, over time shifting and pressure from flushing and water supply changes are inevitable. Small gaps will eventually occur without a gasket leading to leaks, property damage, and health hazards from waste exposure. Investing in the proper gasket is essential.


Summary of Key Points

Choosing the right gasket is critical when installing a wall mounted toilet to avoid leaks and related damage. Consider key factors like the specific toilet model, ease of installation, flange size, and durability needs.

Traditional wax rings work for basic installations while modern foam and rubber gaskets withstand more pressure long-term. Popular top choices include the Fluidmaster Wax Ring, Sani Seal Toilet Gasket, Korky Wax-Free Seal and the Johni Seal.

Always follow best practices when preparing the flange, positioning the gasket, mounting the toilet securely, and applying caulk for extra protection. Replace deteriorating gaskets proactively every 8-10 years.

Final Recommendations

For best results with minimal leaks, the Sani Seal Toilet Gasket is a top choice that fits most wall mounted toilets. The pliable foam material maintains a tight seal long-term while resisting compression. Easy to install for DIY or professional applications.

For added durability, choose the Johni Seal Toilet Gasket. The dual rubber and foam sealing ring stands up to decades of use but comes at a higher price point. Keep the smooth flange surface and proper bolt tightening in mind.

Be sure to evaluate your particular toilet model, installation environment and usage level before deciding. But by investing in a quality gasket and following sound installation techniques, you can enjoy leak-free convenience from your stylish wall mounted toilet for years to come.

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