Park Tool TSI-1 - Tubeless Sealant Injector, One Size, Blue | Park Tool Tubeless Sealant Injector - Precise 3.5 oz. for Tubeless Tires

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.

Brilliant! Dissambles completely for making it easy to thoroughly clean out sealant before storage.

Great tool! Large capacity, slurps up sealant well, comes apart for easy cleaning, seems durable. Way better than the cheap ones I’ve been using.

Park Tool knocked this one out of the park. So simple but just so much better than any other sealant injector I've used. The thing is solid, and the design actually injects sealant into the tire directly... instead of just in the general vicinity of the valve and all over the shop floor like some other ones. My only regret is not buying this thing years ago.

As with most Park Tools the price is high but the quality is great. Used this at least 10 times so far and it has performed great.

It's a $25 turkey baster but I still like it (mostly). Here's the deal. The plastic tube has a good chance it won't fit all the way through the valve stem. I have three different stems and the tube doesn't fit through the rubber end on any of them. You'll probably kink it trying to force it through so don't bother. The "extraction" part doesn't work so just stick with the brake-cable-as-dipstick method to check the level like you've been doing for years. The stopper seal is silicon so it will last more than a season. When you pull it to fill the syringe, it doesn't break off from the rubber part like the $4 ones do. The part you put your hand on is also held in place and centered so if you have to push a little harder get through a little clog, you can still do it with one hand. The sticker on the side for Oz. is going to come off at some point but the cc marks are part of the mould. Metric isn't that hard, you'll be fine. If you don't have problems with the $4 ones, keep buying them. If you want something that does a good job at at least filling your tires that is probably $7 over priced, this one works the best so far. Still can't stomach $25 for some plastic stuff? Put it on your birthday list.

Easy to use and to clean up afterwards. Works well directly through the valve.

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.

Sehr gute Ergänzung zu dem Tubless System , verhindert unnötiges rumgeschmiere …

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.

Couldn't expect anything but the best from Park Tool. I've bought other sealant injections before that just don't work. This one does what it's supposed to. Big easy to read numbers, metal injection syringe that doesn't clog up. Don't waste your time on cheap sealant injectors, and just get this one instead.