Sealant and syringe in one box, and the best sealing figures on the shelf
Orange Seal Endurance 237 ml + injector
A 237 ml bottle of latex Endurance sealant with an injector, sealing punctures to 6.35 mm (0.25 in) and slices to 12.7 mm (0.50 in).
What you are getting
8 oz (237 ml) of Orange Seal Endurance sealant with an injector, 227 g. Latex-based with nanite particles, sealing punctures to 1/4” (6.35 mm) and slices to 1/2” (12.7 mm), with 60–120 days between top-ups. $19.42.
It is the only product on this page that is both halves
Four of the seven items in this survey are injectors with no sealant; two are sealant with no injector. This is one box containing both — which makes it the one purchase that gets a tubeless setup going from nothing.
The buying advice on this shelf is about injecting through the valve rather than breaking the bead, and that needs two things: a valve with a removable core, and a syringe. This supplies the syringe.
And it costs 67% more per milliliter than its own refill
| volume | injector | price | ¢/ml |
|---|
| This kit | 237 ml | yes | $19.42 | 8.2 |
| Endurance refill, on this page | 473 ml | no | $23.09 | 4.9 |
So the injector costs roughly $7.70 in this arrangement — which is about what the Thinvik injector on this page costs on its own at $9.99, and a third of the Park Tool TSI-1 at $28.90.
Buy this once; refill from the 16 oz bottle thereafter.
Both numbers, for both kinds of injury: 6.35 mm (0.25 in) for a hole, 12.7 mm (0.50 in) for a slice. SILCA on this page gives 7.5 mm (0.30 in) for holes and nothing for slices; the Muc-Off published here gives 6 mm (0.24 in) for holes.
Orange Seal is the only maker in this survey to distinguish the two, and the distinction is the one that decides whether a flint cut gets you home.
Sixty to a hundred and twenty days, stated as a range
The introduction to this shelf treats sealant as a consumable with a service interval. Orange Seal’s 60 to 120 days is the only interval in this survey given with both ends — the SILCA “6+ months” and the published Muc-Off “up to 6 months” are open-ended.
A two-to-one spread is honest. Heat, low humidity and a porous casing all shorten it.
What the injector in the box is not
No capacity is published for it. The three standalone injectors on this page that do publish one are 100 cc, 100 ml and 59 ml.
Since 237 ml is the bottle and a mountain bike tire takes roughly 100 ml, the injector’s capacity decides whether a wheel is one pull or two. Orange Seal does not say.
“Nanite particles engineered to rapidly seal”, “2–3 times longer than standard sealants”, “eco-friendly, biodegradable ingredients”, “optimized for performance in varying temperatures”.
Four claims, four missing numbers: no particle size — and the introduction to this shelf names particle size as a comparison point — no named comparator for the 2–3×, no biodegradability standard, and no actual temperature range, where SILCA gives −15 °C (5 °F) and the published milkit sealant −20 °C (-4 °F).
What is not published
No injector capacity, no particle size, no temperature range, no CO2 compatibility, no volume per wheel, and no latex-free option. What it does publish, better than anything else here, is what it will seal.
Availability
Read on the day this page was built: $19 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.
