If you ride tubeless, you know the pain of trying to add sealant without making a mess. Fortunately, several companies now offer dedicated sealant injectors to make the job quicker and cleaner. Over the years, I’ve tested a range of injectors to find out which ones are worth adding to your toolbox.

According to a recent survey, 45% of Singletracks readers use a syringe to add tire sealant, and another 36% use a sealant bottle with a nozzle or hose attached. No matter which method you prefer, there’s a solution here for you.

Thinvik Tubeless Sealant Injector

The Thinvik injector is affordable and functional for basic use, though compatibility is somewhat limited. The flexible hose screws directly onto Presta valve threads, but I’ve found it doesn’t fit Reserve or Muc-Off Big Bore valves. Still, if you’re using standard tubeless valves and want a low-cost option, this one gets the job done. However, the hose is a bit thinner than some of the others in the test, which makes sucking old sealant from a tire more difficult.

• Price: $9.99
• Capacity: 100mL / 3.5oz
• Buy from Amazon

Silca Ultimate Sealant Injector

The Silca tire sealant injector is sleek and easy to use, with a flexible hose that fits snugly over the valve. It worked with every valve I tested, though the fit was a little tight on some standard Presta cores. The main drawback to this injector is the small 2oz capacity—too little for a full fill on a mountain bike tire without reloading. Also, the measurement markings are hard to read, especially when sealant gets involved. The looped end provides a nice grip for sucking up especially thick sealants.

• Price: $9.95
• Capacity: 60mL / 2oz
• Buy from Silca for $9.95 or Amazon for $11.99

Stan’s Sealant Injector

The Stan’s injector holds enough sealant for most MTB tires in a single go and is designed to fit standard valves and also Stan’s Exo-Core valves. It’s the only injector that you fill from the top rather than slurping through the hose, which ensures the sealant is well mixed. Read my in-depth review here.

Stan’s specifically designed their injector so that it doesn’t suck sealant from the bottle, which is understandable. Unfortunately, this means you can’t use it to take old sealant out of a tire.

• Price: $15
• Capacity: 150mL / 5oz
• Buy from REI

MilKit Compact Tubeless Valve Set with Injector

MilKit’s system is the most full-featured syringe I’ve used. The rigid, narrow tube inserts directly into the valve, allowing you to add or remove sealant without breaking the bead, and it can also be used to check sealant levels without removing the tire. It works with nearly all valves I tested, except the Reserve Fillmore. The biggest downside is that it requires diligent cleaning—sealant clogs the narrow-diameter hose easily if left to dry. Read my 2018 Milkit injector review here.

Most Milkit injector packages we’ve seen include valves, which adds to the price, though the injector works with standard Presta tubeless tire valves and also some non-standard ones like the Muc-Off Big Bore valve as shown above.

If you already have another injector, but need a way to check sealant levels without removing your tire from the bead, this Muc-Off dip stick is worth considering.

• Price: $45 (includes two valves)
• Capacity: 60mL / 2oz
• Buy from Amazon

Orange Seal 8oz injector bottle

This sealant bottle doubles as an injector, with a hose included for adding sealant directly to the valve. It’s simple, compatible with all the valves I tested, and includes a full 8oz of sealant. However, there’s no way to measure how much sealant you’ve added, which could be an issue if you’re trying to top off with precision.

Some bottles come with an even fancier injector than the one shown here. And don’t forget to hang onto the bottle once it’s empty; you can refill it with a larger 32oz bottle the next time!

• Price: $18 (includes 8oz of sealant)
• Capacity: 237mL / 8oz
• Buy from REI

Stan’s 2oz Bottle

I’ve been using the same Stan’s 2oz bottle for over 10 years, and it shows. It’s not fancy, but it works—just snip the nozzle to fit your valve and squeeze. It’s too small to do a full fill without refilling and doesn’t work with Fillmore valves, but it’s the classic DIY approach that still holds up.

Large bottles of Muc-Off tire sealant also feature a nozzle top that can be cut to size like the Stan’s bottle shown here.

• Price: about $3.50
• Capacity: 60mL / 2oz
• Buy from REI

ProductPriceCapacityFits Most ValvesNotes

Thinvik	$9.99	100mL / 3.5oz	No	Solid choice and reasonable price
Silca Ultimate	$9.95	60mL / 2oz	Yes	Limited capacity and hard-to-read measurements
Stan’s Injector	$15	150mL / 5oz	Yes	Convenient and simple, but no way to measure sealant
MilKit Valve Set + Injector	$45*	60mL / 2oz	No	Premium functionality, needs diligent cleaning
Orange Seal Bottle	$18**	237mL / 8oz	Yes	Convenient and simple but no way to measure sealant
Stan’s 2oz Bottle	$3.50**	60mL / 2oz	No	Basic but tried and true

* price includes two tubeless tire valves ** price includes sealant

Final thoughts

A sealant injector can be a nice tool to have in your toolkit that makes adding sealant a slightly less messy job. I usually default to my old Stan’s bottle or Orange seal injector, but when it’s time to suck up old sealant from a tire, I reach for a syringe. With most of these priced under $15, it’s an easy item to add to your bike toolkit.