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12 votes
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Do I need to refill sealant after puncture?

Pull the valve core and poke a 2mm Allen wrench down to test the fluid level with the valve at the 6 o'clock position with the tire off the ground. You want "some" free liquid. How much depends on the ...
Nathan Knutson's user avatar
11 votes
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Do tubeless sealants remain a highly viscous liquid or do they form a thin rubber film?

The sealant is a suspension of latex particles. When there is an opening (like a puncture, or a pore in the rubber), the liquid is carried away by the air leaking through the opening, causing the ...
Rеnаud's user avatar
  • 20.9k
8 votes
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What causes tire sealant to seal?

Here's a photo of sealant failing inside a tyre. These are the latex molecules lumping up together rather than staying in suspension in the carrier liquid which is glycol-based but varies by brand. ...
Criggie's user avatar
  • 127k
8 votes

What's the easiest way to re-use 2 oz bottles of tire sealant?

The caps from 2 oz plastic vanilla extract bottles fit perfectly. The cap from the 4 oz glass bottle on the far left in the first picture is larger, but the other three caps are interchangeable. There ...
user66598's user avatar
  • 1,097
7 votes
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Are tubeless tires the solution to frequent flat tires?

I wouldn't go for tubeless as a first attempt to solve the problem. Tubeless might be a good solution for skinny racing bike tyres, which are rather prone to puncturing. But you really shouldn't be ...
David Richerby's user avatar
7 votes
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Tubeless tire air loss overnight after about 1.5 months of normal behaviour

The evidence of the bubbles around the sidewall/rim interface is normal when a deflation occurs. For example, when adding additional sealant to a tire, and deflating it to do so, once the tire gets ...
Ted Hohl's user avatar
  • 6,437
6 votes
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How can I tell if my presta valves have removable cores?

Have a close look. On a presta valve there is a wide threaded part that the lock ring attaches to. And a narrower part with the valve lock nut above it that the cap threads onto. If the narrow part ...
alex's user avatar
  • 5,754
6 votes
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Fixing pinches with latex-based sealant?

Latex based sealants are great at fixing the sort of small holes that you'll get from thorns and glass. If the hole is too big, then all of the sealant will just rush out with the air in your tube. ...
Carbon side up's user avatar
6 votes

Bontrager thorn-resistant vs self-sealing tubes?

I used to live in the Mojave desert and had that problem a lot. The only thing that seemed to work was a hard plastic strip that you can install on the inside of your tire, that's the first line of ...
Craig's user avatar
  • 61
6 votes
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How to clean sealant stuck in pump head?

You should be able to disassemble the pump head and clean out the blockage manually. I’d try 70% isopropyl alcohol as a solvent to help remove sealant.
Argenti Apparatus's user avatar
6 votes

Do I need to refill sealant after puncture?

Depends on your confidence levels - if you're going for a 3 hour tour then its a very long walk home. For a 5 minute roll to the local shops, a walk would merely be annoying. Topping up sealant is ...
Criggie's user avatar
  • 127k
5 votes

Bontrager thorn-resistant vs self-sealing tubes?

I never had any luck with sealants that go into the tube, even in northern countries where no thorns are present but only occasionally some broken glass. The only thing it did to me was leak, soil ...
Grigory Rechistov's user avatar
5 votes

Will Stans No-Tubes (or other tubless tire sealant) work in a standard tube to prevent leaks?

I've been using Stan's sealant in my tubes for four years: both my road and mt bike and four bikes of kids/spouse. Averaging about one flat a year for each bike and only on occasion a flat in the ...
Ron Christiansen's user avatar
5 votes

How often should I refresh the sealant in tubeless tires?

And probably consider temperatures. In the summer, it’ll frequently be in the 100’s here. I’ve found that it dries up much more quickly when it’s hot.
Rick's user avatar
  • 51
5 votes

How often should we add inner tube sealant liquid?

It depends. If you have regular tube tires and the sealant was something like Slime, then in theory you don't have to put more in unless you have a flat. In reality, Slime thickens over time. You can'...
RoboKaren's user avatar
  • 29.2k
5 votes

Tubeless sealant leaks in the rain

I don't know what the association would be with rain, but sealant coming from random spots on the rim but not the bead lock area implies a tape problem. If it's happening at the bead itself (the joint ...
Nathan Knutson's user avatar
4 votes
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How can I tell if a tire contains slime?

To find out if there is sealant inside the tube, cut it open - kinda terminal for the tube take it off the rim and deflate it then squish the tube with your hands. It will feel more slippery than ...
Criggie's user avatar
  • 127k
4 votes

How does Slime coagulate and seal holes in tires?

Most sealants work because they are actually a fibrous fluid or rubber solution. When a puncture happens and the air pressure forces the fluid out a hole, the fibers create a plug or the rubber ...
Deleted User's user avatar
4 votes

Mixing tire sealants

Yes - mixing sealants will either make no difference, or both will interfere and neither will work. Start by checking the SDS (aka the MSDS) Stans: https://www.notubes.com/pub/media/wysiwyg/GIS-...
Criggie's user avatar
  • 127k
4 votes
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What could cause my tubeless tire (700x25) to leak air at nominal pressure?

Road Tubeless. Sometimes they seal up, sometimes they don't. Early in my road tubeless adventures, I let the sealant just do its job. It took about 15 minutes to really get the seal good enough to ...
Ted Hohl's user avatar
  • 6,437
4 votes
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How do I stop a removable valve core from leaking?

It’s unclear to me why you’ve removed the valve core. The valve core is the least likely culprit of this problem. If you have a tubeless setup, I’d make sure the bead is sealed up, the valve lock nut ...
Paul H's user avatar
  • 4,152
4 votes

Why does Tire Sealent have an Expired Date?

The natural latex one can deteriorate with time. However, this expiration date is not a "Use by". It just says how long the properties "like new" are guaranteed. The latex can get ...
Vladimir F Героям слава's user avatar
4 votes

How long does it take to add 2 oz sealant through valve?

That is not normal. You should be able to put the syringe fully through the valve stem and into the interior of the tire. You have something blocking the inside of the valve stem, and it is most ...
Ted Hohl's user avatar
  • 6,437
3 votes

How to clean tubeless tire sealant from rims

I did this weekend. It was not hard to do it mechanically with a piece of cloth and water. Then for patching I needed a piece of a very clean surface so I used a dish-washing liquid and then finally ...
Vladimir F Героям слава's user avatar
3 votes
Accepted

Can tire sealant be used in anti-decubitus cushion?

I'll do my best to help with my knowledge of sealant, and this was too long to comment. Sealant MIGHT work.... but it may cause more issues than it fixes. My main concern would be getting it from ...
Nate W's user avatar
  • 9,282
3 votes

Will Stans No-Tubes (or other tubless tire sealant) work in a standard tube to prevent leaks?

I have used Stan's in my tubes for six years on my bicycling touring. After over 12,000 miles I've never had a flat! My touring bike has tubes with Stan's and my MTB is tubeless with Stan's. The ...
Anthony Daugherty's user avatar
3 votes
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How can I safely clean Stan's tubeless tyre sealant from carbon rims?

Stan's is WATER SOLUABLE. Clean it with water. Some mild soap may help if it's stubborn. Stan's FAQ
jwh20's user avatar
  • 978
3 votes

Tubeless sealant leaks in the rain

From my read of the photograph, I believe this is brake grime, not tubeless sealant. The black color is some mixture of brake pad material and aluminum from the rims and we can see that it extends ...
Pisco's user avatar
  • 773
3 votes

Why does my tubeless tire keep sweating?

I have found tremendous inconsistency in tubeless tires. At first I believed excessive sealant "sweating" was due to my faulty installation and not adequately coating the inside of the tire ...
Jeff's user avatar
  • 188
3 votes
Accepted

Should the valve core of a tyre that's set up tubeless have some goo from the solidified sealant?

Not normally in a new install. You might see a small amount of fluid coating the core. It normally takes some months of use to see evidence of clotting in the valve. You’ll start to find it harder to ...
Warren Burton's user avatar

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