TSI-1 - Tubeless Sealant Injector, One Size, Blue

I’ve been running tubeless for a while now, and adding or topping off sealant used to be a messy chore. The Park Tool TSI-1 Tire Sealant Injector completely changes that. It’s simple, clean, and makes the whole process take less than a minute. The injector comes with a long hose that fits snugly onto Presta valve stems (after removing the valve core). The syringe is large enough to handle a decent amount of sealant in one go, so no more spilling from trying to pour directly into the tire. Quick How-To: 1. Remove the valve core with a core tool. 2. Measure out your sealant in the injector. 3. Attach the hose to the valve stem. 4. Slowly push the sealant in. 5. Reinstall the valve core, air up the tire, and spin to distribute. That’s it—no more mess on the floor, no sealant sprayed all over the rim, and no wasting product. Pros: • Clean, quick, and accurate way to add sealant • Works with both Presta and Schrader valves • Durable build quality (typical Park Tool) • Large syringe capacity Cons: • Hose needs a quick rinse after use to prevent sealant from drying inside • Slightly more expensive than generic injectors, but worth it for the quality Overall, this is one of those tools you don’t realize you need until you try it. If you run tubeless, the TSI-1 pays for itself in saved time and frustration after the first use.

The Park Tool Tubeless Sealant Injector is an absolute game-changer for anyone running tubeless tires. This tool makes the messy process of adding sealant much easier and cleaner. The large capacity lets me load up enough sealant for multiple tires, and the nozzle fits perfectly into both Presta and Schrader valves without any leaks. Ease of Use: The design is simple and effective—just fill the injector, attach it to the valve, and squeeze. I can get a precise amount of sealant into the tire without spilling everywhere, which makes tire maintenance much quicker and less frustrating. Quality and Durability: It’s built with quality materials that can withstand repeated use. The clear body also allows me to see how much sealant is left, which is a nice touch for tracking usage. Pros: Easy to use, mess-free sealant injection Large capacity for multiple tire applications Durable and well-made Works with both Presta and Schrader valves Cons: Might be a little overkill for single tire applications, but perfect for frequent tubeless users If you’re tired of using makeshift methods to add tubeless sealant, the Park Tool TSI-1 is definitely worth the investment. It’s simple, effective, and a real time-saver.

Park Tools means quality and innovation. They have the tool for every bike need. I run tubeless on all bikes and have tried so many ways to get the stans in without it going all over the place. None were great. Park has solved this issue. Easy to measure out, apply through the stem and no spills. Make sure you shake up the no tubes and get it in the tire asap so the tiny rubber pieces don’t clog the tool. Easy to clean if you do but being quick about the use avoids the issue.

Park tool quality. Can’t go wrong. Have used this a few times. Easy to use and clean. Can also be used to remove liquid sealant from tires.

This is a vast upgrade from the first addition, which was like one of the syringes you buy at the drug store. I maintain a fleet of over twenty bikes used in my touring business and got tired of struggling with the old one. You would inevitably get sealant all over the wheel then you were trying to unscrew the fitting from the presta valve. The new one is purpose built with a large capacity barrel and a well built plunger. Best of all it uses a long, thin tube that simply slips right into the valve after you remove the core. Quick, easy, and best of all, no mess. This winter I'm going to add sealant to all of the bikes in my fleet and feel like I got the best tool for the job.

Makes dealing with tubeless sealant easy. You can even use it to suck out existing sealant if you need to work on the tires/wheels or just refresh old sealant. Highly recommended.

I really like that the syringe is marked up to 100 ml, whereas my old tool only holds only 60 ml. This tool is sturdily made with replaceable parts, so should stand up well to heavy use. On the down side, the proboscis tube (the thin one) is only 12 cm long while my largest bottle of sealant is 20 cm long, making the tube too short to reach more than 3/5 of the way into the bottle when I need to fill the syringe with sealant. My other (cheaper) injector came with an extension for that purpose. Fortunately I’m able to use that extension with the Park tool, but Park should include a longer tube or an extension. You can extend the tube yourself with a length of hosing of about 3.5 mm internal diameter.

If you have tubeless tires, then you'll know what a mess is made if you ever have to travel with them in a bike box and therefore have to deflate the tires. It's a seemingly small thing, but the ability easily to remove the sealant as well as insert it is the key to the value of this tool. You should also be replacing your sealant every couple of months, so this tool is useful for that, as opposed to the ones which fit over the valve stem. It's also the usual Park Tool quality.

Funktioniert perfekt, alles so wie es soll :-)

Practico, funciona muy bien para absorber e inyectar, buena opción para no ensuciar, aunque solo lo usado 3 veces parece buena herramienta, la lavada después de usar está fácil.

As with all park tool tools this is built to a high standard. Good thick quality and easy to use. Come with spare tubes and disassemblesfor easy cleaning.

Best I've ever used. So simple. Should come with more than one syringe 💉 as when the kids uses it, it folded

Fait le job de manière efficace. Contrairement aux produits bas de gamme, celui-ci n'est pas jetable.