What Is John Deere TY26370 Tire Sealant (Usage Guide)
John Deere TY26370 is a liquid tire sealant for pneumatic equipment tires. It may reduce air loss from some small punctures, but it is not a tire replacement or a structural repair. Before use, check the bottle label, your equipment manual, and the tire maker’s guidance. Follow the label’s dose and method; do not guess.
Wouldn’t it be easier to handle a slow tire leak if you knew whether sealant was suitable, how much to use, and when to stop? The key is to treat TY26370 as a limited repair aid, not a way to make every damaged tire safe.
I explain tire sealant by starting with the tire itself: Is it pneumatic, is liquid sealant allowed, and is the damage small enough for a sealant to be considered? If any answer is unclear, pause and check the product label or ask a tire professional.
What John Deere TY26370 Tire Sealant Is
TY26370 is a liquid tire sealant made for use in equipment tires, subject to the product label and tire maker’s guidance. A common listing gives the package size as 24 fluid ounces, but packaging can vary. The label on your container is the final reference for its contents and instructions.
The sealant goes inside a pneumatic tire, which is a tire that holds air. As the tire turns, the product may spread within it and help limit air loss from a small puncture. It does not replace the tire, repair every type of damage, or restore damaged tire structure.
A plug is a separate repair material inserted into a puncture, while a patch is fitted to the inside of a tire. Sealant is neither of these. Do not assume that a tire can be repaired with liquid just because it is losing air.
| Question | What to check |
|---|---|
| What product is this? | John Deere tire sealant, part number TY26370 |
| What size is the package? | Often listed as 24 fl oz; verify your container |
| How much should go in the tire? | Use the TY26370 label’s tire-size and dosage chart |
| What pressure should I use afterward? | The equipment or tire maker’s specified cold pressure |
| What damage might rule it out? | Sidewall damage, bead separation, exposed cords, or a large cut |
Equipment Setup and Safety Preparation
Prepare the equipment before opening or applying the sealant. Park on firm, level ground, lower attachments, set the brake, stop the engine, remove the key, and let hot parts cool. Wear eye protection and gloves, then inspect the tire for damage that sealant should not be expected to fix.
First, confirm that the tire is pneumatic and that both the tire maker and equipment manual allow liquid sealant. Do not assume it is compatible with a tube, a tire-pressure sensor, a foam-filled tire, or every tire compound. If the manual or tire information is unclear, contact the equipment or tire maker before proceeding.
Next, inspect the damaged area. A small puncture may be a situation in which the product label’s instructions are relevant, but size alone does not establish that a repair is safe. Do not use sealant as a fix for a damaged sidewall, separated bead, exposed cords, or a large cut.
A bead is the tire edge that sits against the wheel rim and helps hold the tire in place. If it has separated, sealant may not stop the air loss. Continuing to operate with a tire that may lose pressure or come off the rim can lead to loss of control or rim damage.
Before adding anything, check the label for the right tire-size category, amount, and application method. Do not estimate a dose from the bottle size or from a general rule for other sealants. Do not mix TY26370 with another sealant unless both manufacturers explicitly approve the combination.
Sealant Application and Field Operation
Apply TY26370 only after confirming compatibility, the label-directed amount, and the stated method. Locate the valve stem, then follow the product instructions for adding the sealant. Do not remove the valve core or inject product through the valve unless the TY26370 directions specifically tell you to do so.
The tire-size and dosage chart on your bottle is the source for the amount. A larger bottle does not mean the tire should receive the whole bottle. Using too much, too little, or a dose chosen from a generic chart can depart from the product’s instructions.
After applying the specified amount, refit the valve cap and inflate the tire to the cold pressure listed by the equipment or tire maker. “Cold pressure” means pressure checked before the tire has been warmed by operation. Do not use the sidewall’s maximum pressure as the target unless the equipment maker specifies it.
Follow the sealant instructions for distributing the product inside the tire. If they call for rotating or operating the equipment, do so only as directed and only when the tire appears safe to use. Do not drive on a tire with severe damage or continuing rapid air loss just to spread sealant.
| Stage | Action | Avoid |
|---|---|---|
| Confirm | Check the label, manual, and tire guidance | Assuming all tires accept sealant |
| Measure | Use the TY26370 dosage chart | Guessing from package size or generic advice |
| Apply | Follow the stated method at the valve area | Removing the valve core unless instructed |
| Inflate | Use the specified cold pressure | Treating sidewall maximum as the target |
| Distribute | Follow the label’s instructions | Operating an unsafe or badly damaged tire |
Two illustrative tire-leak situations
These examples show how to apply the decision process; they are not documented TY26370 repair results. The correct action depends on your tire, the type of damage, and the instructions for the exact product package you have.
A small tread-area puncture: If the tire maker permits liquid sealant, and the TY26370 label covers that tire size and application, follow its dose and method. Then inflate to the specified cold pressure and recheck for leakage. A successful result is not guaranteed.
A sidewall cut or loose bead: Do not rely on sealant. Stop using the equipment and arrange a professional tire assessment or replacement. These areas affect the tire’s structure or its connection to the rim, and continued use may lead to rapid pressure loss or loss of control.
Post-Application Inspection and Tire Maintenance
After application, check whether air loss continues and verify pressure again using the correct cold-pressure specification. A tire that still loses air, cannot hold the specified pressure, or shows new damage needs further attention. Do not keep adding sealant unless the label explicitly directs you to do so.
Inspect the tire and valve area for signs of leakage. If the leak persists, stop using the equipment and have the tire professionally assessed. This matters even if the tire seems to hold air briefly: a short-term change does not confirm that structural damage has been repaired.
Check pressure again before using the equipment, following the intervals and methods in its manual. Tire pressure can affect how equipment handles and operates. Do not treat sealant as a substitute for routine inspection, correct inflation, or repair of damage that requires professional work.
If you are unsure whether the product is compatible, whether the dose was correct, or whether the leak has stopped, pause rather than experimenting. Keep the label and equipment information available when contacting a dealer or tire professional.
Storage and Seasonal Care
Store TY26370 as directed on its container, and keep the label readable for future use. Follow any storage limits, handling warnings, and disposal guidance printed on the package. Do not assume that an opened bottle or sealant left in a tire remains usable for a set time unless the maker states that period.
Before seasonal storage, inspect the tire and check pressure according to the equipment manual. If you used sealant, record that fact so it can be shared with a tire professional later. Tell them the product name and part number, and note when and how much you added if you know.
Do not combine products during storage or later maintenance unless the makers approve it. If the container is damaged, the label is missing, or the contents appear unlike the product description, contact the supplier rather than guessing how to use it.
Conclusion
TY26370 is a liquid sealant for pneumatic equipment tires, not a universal repair. Check the tire and equipment guidance first, follow the exact label dosage and method, and use the maker’s cold-pressure specification afterward. If the tire has structural damage or keeps leaking, stop using it and seek professional help.
Frequently Asked Questions
What is John Deere TY26370 used for?
TY26370 is a liquid tire sealant intended for pneumatic equipment tires. It may reduce air loss from some small punctures when the tire and product instructions allow its use.
How much TY26370 should I use?
Use the tire-size and dosage chart on your TY26370 container. Do not estimate an amount from bottle size or use a generic ounces-per-tire rule.
Is TY26370 a tire plug or a replacement tire?
No. It is a liquid sealant, not a plug, patch, replacement tire, or structural repair. Some tire damage needs professional repair or tire replacement.
Can I use TY26370 in any tire?
Do not assume so. Confirm that the tire is pneumatic and that the tire maker and equipment manual permit liquid sealant. Check special cases such as tubes, pressure sensors, and foam-filled tires before applying it.
Should I remove the valve core to add TY26370?
Only if the TY26370 instructions specifically require it. Follow the application method on your product label; do not remove the valve core based on a general sealant procedure.
What tire pressure should I use after adding sealant?
Inflate to the cold pressure specified by the equipment or tire maker. Do not use the sidewall maximum as your target unless the equipment maker says to.
Can TY26370 repair a sidewall cut?
Do not rely on it to repair a sidewall cut. Stop using the equipment and have the tire professionally assessed or replaced.
What if the tire still loses air after application?
Stop using the equipment and have the tire checked. Persistent leakage may mean the sealant did not stop the leak or that the tire needs a different repair.
Can I mix TY26370 with another tire sealant?
Do not combine sealants unless both manufacturers explicitly approve the mixture. If you cannot confirm compatibility, use neither combination nor a guessed procedure.
Is TY26370 commonly sold in a 24-ounce bottle?
It is commonly listed as 24 fluid ounces, but package sizes or regional versions can differ. Check the label on your container for the exact size and instructions.
(This article was written by one of our staff writers, Evan Bradley. Visit our Meet the Team page.)
