The only sealant that tells you what slice it closes
Orange Seal Endurance sealant refill, 473 ml
A 473 ml refill of latex Endurance sealant, sealing punctures to 6.35 mm (0.25 in) and slices to 12.7 mm (0.50 in), with 60 to 120 days between top-ups.
What you are getting
A 16 oz (473 ml) refill bottle of Orange Seal Endurance sealant. Latex-based, with nanite particles, stated to seal punctures up to 1/4” (6.35 mm (0.25 in)) and slices up to 1/2” (12.7 mm (0.50 in)), with 60 to 120 days between top-ups. $23.09 — 4.9 cents a milliliter.
“Seal punctures up to 1/4” and slices up to 1/2”.”
Two numbers for two different injuries, and that distinction is the most useful thing on this page. A round hole closes from all sides; a slice is a straight cut that the tire’s own flex keeps opening and closing, which is much harder to bridge. A flint cut is a slice.
SILCA’s sealant on this page publishes a single hole figure of 7.5 mm (0.30 in) and no slice figure. The Muc-Off already published on this shelf gives 6 mm (0.24 in), also for holes only.
So on holes, SILCA claims more; on slices, Orange Seal is the only one that claims anything at all.
Sixty to a hundred and twenty days, which is a service interval with honest spread
“Staying effective for 2–3 times longer than standard sealants… 60–120 days between top-offs.”
The introduction to this shelf says sealant is a consumable with a service interval. This is the only product in the survey to give that interval as a range rather than a ceiling — and a two-to-one spread is honest, because it depends on temperature, humidity and how porous the casing is.
SILCA’s “6+ months” and Muc-Off’s “up to 6 months” are both longer and both one-sided.
Shipping weight says 118 g (4.2 oz), which cannot be right
473 ml of latex sealant weighs about half a kilo. The 8 oz bottle-with-injector of the same sealant on this page is recorded at 227 g, which fits 237 ml almost exactly.
So the 118 g (4.2 oz) on this listing is wrong, and the plausible figure is around 500 g (17.6 oz). Nothing turns on it except shipping, but it is worth knowing which number to ignore.
4.9 cents a milliliter, and the arithmetic against the kit
| volume | injector | price | ¢/ml |
|---|
| This refill | 473 ml | no | $23.09 | 4.9 |
| 8 oz with injector | 237 ml | yes | $19.42 | 8.2 |
| SILCA 1 L | 1,000 ml | no | $44.99 | 4.5 |
The 8 oz kit is the one to buy first, because it contains the injector. This refill is the one to buy afterwards, at 40% less per milliliter.
Orange Seal selling both is the sensible arrangement, and neither listing points at the other.
Biodegradable, which two products here claim
“Developed with eco-friendly, biodegradable ingredients.”
The published Schwalbe and milkit sealants on this shelf make environmental claims of their own, and none of them — including this one — names a standard or a test. A latex sealant is a natural polymer in a water base, so the claim is plausible on its face.
And it addresses the thing a sealant can damage
“Orange Seal adheres to the tire casing… without causing delamination, breakdown, or damage to the rubber.”
Delamination is the real risk: a sealant that attacks the bond between casing and tread destroys the tire from inside, and ammonia-based formulas have done it. Stating the absence is worth more than it reads.
What is not published
No volume per wheel, which this shelf’s introduction asks for; no particle size for the “nanite particles” despite the shelf naming particle size as a comparison point; no temperature range, where SILCA gives −15 °C and the published milkit −20 °C; no CO2 compatibility; and no latex-free option.
Availability
Read on the day this page was built: $23 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.
