The only injector here with a gauge, and it excludes no sealant
Park Tool TSI-1 sealant injector, 100 cc, gauged
A 100 cc syringe-style sealant injector with a graduated barrel, for any injectable sealant through a Presta valve with a removable core.
What you are getting
The Park Tool TSI-1 sealant injector: a syringe holding 100 cc (3.5 fl oz), with an oversized body and a readable gauge, and a long thin tube that fits “all the way through most Presta stems with removable valve cores”. 100 g (3.5 oz). $28.90 — nearly three times the cheapest injector here.
It is the only injector on this page with a gauge
“Oversized syringe body with easy-to-read gauge for precise application of sealant.”
That is the difference, and it matters for one reason: nobody on this shelf publishes how much sealant a wheel takes. The introduction to this page lists “the volume recommended per wheel” among the four things worth comparing, and not one of the three sealants in this survey states it.
So the figure has to come from somewhere, and a graduated syringe at least lets you be consistent — the same measured amount in both wheels, and the same again at the next top-up. The Thinvik and SILCA injectors here are plain barrels.
100 cc, which is the working standard
Park Tool 100 cc, Thinvik 100 ml, Thinvik kit 100 ml, SILCA 59 ml.
Three of the four converge on 100, which is roughly what a mountain bike tire takes — and is itself the strongest available answer to the question the sealant makers leave unanswered.
It takes any sealant, and says so plainly
“Holds up to 100 cc of any injectable tubeless sealant.”
No exclusions. Both Thinvik injectors on this page refuse “Finish Line and other sealant containing large particles”; SILCA’s injector is specified for SILCA’s own sealant.
That matters next to the SILCA Ultimate sealant on this page, which contains carbon fibers. This is the only injector in the survey that does not exclude anything — though “any injectable sealant” is a claim rather than a tested list, and a fiber-loaded sealant is worth asking about even so.
Removable valve cores, named as the requirement
“Long, thin tube fits all the way through most Presta stems with removable valve cores.”
The buying advice on this shelf is exactly this: buy valves with removable cores, because that is the difference between a five-minute top-up and a full refit. This listing is the one that states the dependency rather than assuming it.
What it does not include is a valve core removal tool. Both Thinvik injectors on this page supply one, and the Thinvik kit adds six spare cores.
“Without making a mess”, and for removal as well
“For setting up and removing tubeless bicycle tire systems without making a mess.”
Removing is the half nobody mentions. A syringe draws out as well as pushing in — so old, thickening sealant can be pulled from a tire before fresh goes in, which is what the service interval on this shelf is really asking you to do. Topping up a tire full of dried latex just adds weight.
What is not published
No hose length — the Thinvik injectors publish 200 mm, which is the figure that decides whether the tube clears a deep rim — no valve core tool, no spare cores, no material, and no statement about Schrader valves, which Thinvik’s core remover explicitly handles.
At $28.90 what you are buying is the gauge and the brand’s reputation for tools that last.
Availability
Read on the day this page was built: $29 at the American Amazon shop.
Read from Keepa on the day this page was last revised; stock and price both move without notice.
Prices quoted in this text were read on 2026-10-06. The live price is at the top of the page.
