Internal seals

Wax-Free Toilet Seals

Set a toilet without wax. The flexible PVC seal sticks to the toilet horn, and its ribs seal inside the drain pipe.

3″ and 4″ drain pipe Floors up to ¾″ above the flange Reset with the same seal No wax, no mess Made in USA

No mess. No guess.

Seals in the pipe, not on the flange. It sticks to the toilet and stays gas-tight through minor movement. Flexible PVC, made in the USA for the long term.

Adhesive lip

Sticks to the toilet horn

One piece

Flexible PVC, nothing to stack or line up

Fernco wax-free toilet seal, black flexible PVC with an adhesive lip and sealing ribs

Flexible ribs

Seal against the inside of the drain pipe

¾″

Built-up floors. Seals on floors raised up to ¾″ above the flange. No risers or stacked wax rings.

Reset

Pulling the toilet to paint or remodel? Reinstall it with the same seal still attached.

Radiant heat

Ideal for in-floor radiant heat systems.

Centers itself

Brings the seal and the toilet to center over the drain.

Gas-tight

Holds a gas-tight seal even when minor movement occurs.

No mold

Resists mold and mildew.

Made in USA

For residential and commercial toilets, floor-mount and back-outlet.

Wax is one shot. This isn’t.

A wax ring seals on top of the flange. The Fernco seal sticks to the toilet and seals inside the drain pipe.

	Wax ring	Fernco Wax-Free Seal
Where it seals	Compressed on top of the flange	Ribs seal against the inside of the drain pipe
Floor above the flange	Extra-thick ring, stacked rings or a flange riser	Up to ¾″, no riser needed
Pulling the toilet	New ring every time	Reinstall with the same seal attached
Radiant floor heat	Wax softens with heat	Ideal for in-floor radiant heat
Setting the toilet	One shot to get it right	Centers itself, and you feel the seal

Which one do I need?

Each seal fits the inside diameter of the pipe or flange opening under the toilet.

FTS-3

3″ drain pipe

Seals to the 3″ inside diameter of 3″ plastic, copper or cast iron drain pipe.

VIEW FTS-3 →

FTS-4

4″ drain pipe

Seals to the 4″ inside diameter of 4″ plastic, copper or cast iron drain pipe, on floor-mount and back-outlet toilets. Also ideal for most smooth-wall 4″ closet wall carriers.

VIEW FTS-4 →

Seals to the 3½″ inside diameter of plastic toilet flanges installed inside 4″ plastic drain pipe, sometimes called a combination, slab or 4x3 flange. Also use it with knock-out flanges or flanges with pipe stops.

VIEW FTS-4CF →

How to measure

Pull the old ring and measure across the inside of the drain pipe, just below the flange. If the flange sits down inside the pipe, measure the inside of the flange instead.

3″ inside	FTS-3
4″ inside	FTS-4
3½″ inside a flange set down in 4″ pipe	FTS-4CF
A knock-out or pipe stop inside the flange	FTS-4CF

Then check the floor. Each seal covers a finished floor up to ¾″ above the top of the flange.

Not sure what’s under your flange? Reach out.

Tape measure across a toilet flange, measuring the inside of 4 inch drain pipe

Measuring the inside of 4″ drain pipe: use the FTS-4.

Floor or wall

Use it on floor-mount toilets and back-outlet toilets. The FTS-4 is also ideal for most 4″ closet wall carriers.

Wall carriers

The FTS-4 fits most 4″ closet wall carriers.

Back-outlet toilets

The seal sticks to the toilet horn before the toilet goes on.

Clean. Peel. Stick. Set.

1

Clean the horn

Scrape off all the old wax. Remove all wax residue with isopropyl (rubbing) alcohol and let it dry completely.

2

Peel

Peel the protective liner off the adhesive.

3

Stick

Press the seal firmly over the horn on the bottom of the toilet, so all of the adhesive touches the toilet.

4

Set the toilet

Wet the ribs with soapy water. Line up with the drain and the flange bolts and lower the toilet. You should feel the ribs compress inside the pipe. Secure the toilet and check for leaks.

Peeling the protective liner off the Fernco wax-free seal

Pressing the Fernco wax-free seal onto the horn of a toilet

Lowering a toilet with the Fernco wax-free seal onto the floor flange

The adhesive needs a clean, dry surface. Any wax left on the horn keeps it from sticking.

Specifications

Parts	FTS-3 (3″ drain pipe), FTS-4 (4″ drain pipe), FTS-4CF (3½″ flange in 4″ drain pipe)
Material	Flexible PVC with adhesive
Floor above flange	Up to ¾″
Toilets	Floor-mount and back-outlet. FTS-4 fits most 4″ closet wall carriers.
Applications	Residential and commercial
Standard	Conforms to ASTM A1045
Made in	USA

All part numbers

3 Wax Free Toilet Seal parts

Open any part for its specs, dimensional drawing and documents.

Common questions

Which size do I need?

Measure the inside of the pipe or flange opening. FTS-3 for 3″ drain pipe. FTS-4 for 4″ drain pipe. FTS-4CF for a 3½″ plastic flange installed inside 4″ plastic pipe (a combination, slab or 4x3 flange), and for any knock-out flange or flange with a pipe stop.

My new floor sits above the flange. Will it still seal?

Yes, on floors raised up to ¾″ above the flange. The ribs seal inside the drain pipe, so you don’t need a flange riser or stacked wax rings.

Can I pull the toilet and reuse the seal?

Yes, on the same toilet. Pull it to paint or remodel, and reinstall it with the same seal still attached. If the seal comes loose from the horn, or you’re setting a different toilet, use a new seal.

Do I have to get all the old wax off?

Yes. Scrape off the old wax, wipe the horn with rubbing alcohol and let it dry completely. The adhesive won’t hold on wax residue.

Does it work with radiant floor heat?

Yes. It’s ideal for in-floor radiant heat systems.

Will it work with a wall-hung toilet?

The FTS-4 is ideal for most 4″ closet wall carriers used with back-outlet toilets.