Questions tagged [sealant]

Questions relating to tube sealants, like the products named Slime or Stan's.

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

The 2 oz bottles of Stan's tire sealant come with a "spout cap" that doesn't seem very air tight. It's intended for single use but I wanted to use 1 oz and save one for later. A few people ...
user66598's user avatar
  • 947
0 votes
1 answer
143 views

Why does Tire Sealent have an Expired Date?

My Orange Seal order just dropped in and after a superficial inspection I realised that it has already expired (7/12/23). I checked my other bottles and they expired two years ago or so. What could be ...
ruedi's user avatar
  • 779
2 votes
1 answer
86 views

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

When I removed the valve core of an MTB tyre that's set up tubeless, it was spotless—so pristine that I figured the tyre must have an inner tube, despite the presence of a stem that looks suspiciously ...
Sam7919's user avatar
  • 9,122
1 vote
0 answers
50 views

Caffélatex Tubeless Rim Strips w/ Stan's Tire Sealant

The manufacturer (Effetto Mariposa) is telling me that if I run their Caffelatex tubeless rim strips with the regular white Stan's tire sealant, that after 1-2 years the strips will be damaged by the ...
user66598's user avatar
  • 947
2 votes
2 answers
444 views

How do I stop a removable valve core from leaking?

This Presta valve core, here removed, has been a nuisance since day one. Once inflated, it holds the pressure well for a trip to the trails, but after 3-4 days, the wheel is flat again. The volume (29&...
Sam7919's user avatar
  • 9,122
3 votes
1 answer
181 views

Rear tire burping on gravel bike (tubeless)

On my morning commute I burped my rear tire twice having never had that issue before. The rim is a wtb i23 (taped from factory and rate "tubeless ready") and it has a Wtb Riddler tire ...
shox's user avatar
  • 976
4 votes
1 answer
4k views

Tubeless tire air loss overnight after about 1.5 months of normal behaviour

I converted to tubeless about 1.5 months ago, and got really good results quick, with air pressure only needing a little re-pump every week or so. Last week I went on holidays, where I took the bike ...
sensationalgarlic's user avatar
3 votes
2 answers
619 views

What could cause my tubeless tire (700x25) to leak air at nominal pressure?

I have a road bike with tubeless tires (700x25) and I have noticed for a couple of rides now that by the end of the ride I lost quite a bit of pressure. To check out what is going on, I re-inflated to ...
icykof's user avatar
  • 33
6 votes
1 answer
706 views

Why does my tubeless tire keep sweating?

I have had this tires for almost a year. They have been also been all this time like the photo, dropping some small drops: One of them was profesonally installed in a shop ( so I expect is not an ...
nck's user avatar
  • 1,509
5 votes
1 answer
169 views

Sealant additives and effectiveness in the cold

So, I switched to tubeless only a few months ago, making this the first winter with tubeless. I've been a little surprised at my results. In some cases, I can remove a little thorn and expect to see ...
Andrew's user avatar
  • 908
8 votes
1 answer
932 views

Do tubeless sealants remain a highly viscous liquid or do they form a thin rubber film?

What is the idea behind a tubeless sealant? It's understood that it forms a viscous thin film that is pushed from the inside out, closing all micro-pores in the rubber and in the tiny gaps between the ...
Sam7919's user avatar
  • 9,122
2 votes
1 answer
335 views

Extending sealant life with water and ammonia

I'm going to do a tubeless setup soon for the first time. Yes, I'm very slow to adopt new technologies. :-) But, as I researched sealants, I had a crazy idea. This paragraph from bikeradar sparked ...
Andrew's user avatar
  • 908
8 votes
3 answers
921 views

Tubeless sealant leaks in the rain

Whenever I cycle in heavy rain with my tubeless tires, what I presume is the sealant seeps out of the rims in a kind of gloopy dark-grey mush. Is there something wrong with the sealant I'm using? Or ...
Hello World's user avatar
1 vote
0 answers
235 views

Tubeless issues: New UST (Mavic Comete pro) with Pirelli Cinturato velo but lots of leaking at the bead

I have been trying to get the Pirelli cunturato velo's (26C) to mount on the Mavic Comete pro (19c inner rim width) which as UST I have not used rim tape. The installation was tough, and I did have to ...
Munki Fisht's user avatar
4 votes
1 answer
2k views

Mixing tire sealants

I had two new tires put on my bike and the LBS used Finish Line sealant. I have managed to puncture after 5 rides. The tire doesn’t lose much air, but air still bubbles out. My experience with Stans ...
Dugong's user avatar
  • 41
1 vote
1 answer
2k views

How can I safely clean Stan's tubeless tyre sealant from carbon rims?

I had a minor accident and spilled a lot of Stan's tubeless sealant on my carbon rims, which has unfortunately dried and become quite difficult to remove. What is the easiest and safest way to get ...
user1049697's user avatar
  • 4,218
2 votes
1 answer
4k views

New innertube won't inflate when in the tyre

I'm replacing my inner tube after getting a flat. When I inflate the tyre with the new tube in, it feels soft- even though the pump says the pressure is 100PSI. The tube inflates and holds its shape ...
smm's user avatar
  • 21
11 votes
3 answers
3k views

Do I need to refill sealant after puncture?

I got my first set of brand new tubeless wheels (Mavic Aksium Elite UST) and next day I had a somewhat large (it looks more than 4 mm) puncture. The sealant did its job, but my teammates described it ...
Samo's user avatar
  • 213
1 vote
2 answers
476 views

I need help identifying used MTB tire sealant

I have a new-used MTB and I don't know what kind of sealant is in its tires. Does anyone know what this may be, or have a good resource for figuring it out? The liquid sealant in the tire is a light ...
nate's user avatar
  • 31
0 votes
1 answer
1k views

Install tube sealant, Schrader?

I have normal tube sealant that I want to install in my bicycle's tubes. My bicycle's tubes have Schrader valves. Will someone here please provide total-noob friendly instructions on how to do what ...
Cycle_Health's user avatar
3 votes
2 answers
9k views

How to clean tubeless tire sealant from rims

How to clean the stuck/dry sealant from the rim edge, and the rim tape, etc? (In order to replace my old tubeless tyres with new, and the new ones to sit on a clean/fresh surface). With water? Water/...
Alex Par's user avatar
  • 579
3 votes
2 answers
3k views

Patching innertubes containing sealant

From my experience, I've learned that Slime will plug/seal a small hole in a tube. Sometimes the tube needs to be inflated 2 or 3 times for hole to seal. If a glueless patch is applied over a small ...
Geoffrey Wheeler's user avatar
20 votes
1 answer
1k views

What causes tire sealant to seal?

I've heard from others that air is what causes sealant to seal. People have said they've read that "somewhere" but I never seem to be able to find those articles. The reason I think air can't be the ...
Robusto's user avatar
  • 481
1 vote
1 answer
2k views

FOX FLOAT CTD Evolution oil leak :(

I have a FOX FLOAT CTD Evolution LV 184x44mm, which worked fine in the summer, afther the cold weather arrived, and I started to ride under 15C, it started to leak some oil. It was pretty nasty, but I ...
trialboj's user avatar
  • 141
4 votes
2 answers
583 views

Tubeless Tyre Repair

Last year I got a puncture in my tubeless tyre from a chunk of glass during a multi-day 500 mile ride (see photo below). The sealant did its job quickly and efficiently, and the seal has held without ...
Diado's user avatar
  • 681
1 vote
1 answer
396 views

Fixing pinches with latex-based sealant?

Having had yet another botched transition from a kerb to the road (and possibly some underinflation) I’ve heard that horrifying thump as the weight of the steel rims and the lock crashed down. Sure ...
4004's user avatar
  • 25
23 votes
1 answer
11k views

The chemistry of mixing sealants

It's become a fairly common occurrence in shops to be faced with a tubeless wheel that was doing fine, slowly started having issues, and hasn't had a sealant re-up in a while or ever, but what sealant ...
Nathan Knutson's user avatar
4 votes
2 answers
1k views

Bontrager thorn-resistant vs self-sealing tubes?

So I arrived in New Mexico a bit over a month ago from the East Coast. Little did I know, there are things called "goatheads" that will give you flats like crazy. So I found that out fast on my 29er. ...
Macuser's user avatar
  • 551
6 votes
1 answer
1k views

How to clean sealant stuck in pump head?

I have a old trusty pump that over the years has the presta head filled with tubeles goo. Noways it pumps the tires very slow. Is there any chemical way to remove it without melting the plastic?
J-unior's user avatar
  • 1,793
1 vote
1 answer
125 views

Can tire sealant be used in anti-decubitus cushion?

I know this is odd question because it is related to wheelchairs (which at least have two wheels :) and use of sealant. Anyway, my father in law use anti-decubitus cushion (similar to the one ...
False Identity's user avatar
2 votes
2 answers
5k views

Are tubeless tires the solution to frequent flat tires?

I have owned a Trek FX3 for about 6 weeks and I have suffered 3 flats in the last 4 weeks (front and back tires). All my cycling is on road (almost exclusively in the cycle lane). The shop I bought ...
bated's user avatar
  • 197
6 votes
1 answer
559 views

How does Slime coagulate and seal holes in tires?

How do tire tube sealants like Slime coagulate and seal holes? They can't coagulate like blood, because there's air already in the tube and they'd solidify. It also can't be in contact with moisture ...
RoboKaren's user avatar
  • 29.2k
4 votes
1 answer
4k views

How often should we add inner tube sealant liquid?

When I recently bought my new MTB: CUBE ACID 29" 2017, the shop put sealant liquid in the inner tubes. So far so good, great, no punctures, no loss of air, really happy. My questions: How often (or ...
Alex Par's user avatar
  • 579
1 vote
1 answer
747 views

Remove visible thorns etc from tyres equipped with inner tubes with sealant liquid?

Running with inner tubes equipped with sealant liquid, should we remove visible thorns etc or not?
Alex Par's user avatar
  • 579
0 votes
1 answer
74 views

Whats the trick with the thump? [closed]

I have repeatedly pushed the valve stem back into the stem and try after try am failing at thumping the valve stem out to where I can grab it. I have pushed it through with a piece of bailing wire; ...
user27241's user avatar
8 votes
4 answers
3k views

How can I tell if a tire contains slime?

I recently had an inner tube on my mountain bike changed, but it was my wife that actually took the bike in to the shop for service. When it came back I noticed the stem has a blue cap rather than ...
Michael's user avatar
  • 1,249
4 votes
1 answer
2k views

How to safely remove dried tire sealant from a carbon frame?

I have a carbon mountain bike frame with some good sections of tire sealant stuck on it (Stan's specifically). If there an easy and/or safe method for cleaning unicorn juice off without hurting the ...
Deleted User's user avatar
  • 9,978
3 votes
1 answer
12k views

How can I tell if my presta valves have removable cores?

I read about valves that have removable cores and that is better for applying sealant. How can I tell if my valves have cores that are removable? (I don't have the type of the tube, or any other info;...
user12363's user avatar
  • 157
1 vote
2 answers
4k views

How to pour tubeless sealant without removable core valves

I have an Ultegra UST wheelset and tubeless tyres on them. After suffering some punctures I decided to run them with a tubeless sealant. The problem is that the sealant's manual instructs you to ...
kryger's user avatar
  • 488
10 votes
1 answer
1k views

Are presta valve cores universal?

Is a Stan's presta valve necessarily compatible with presta valve cores from other manufacturers? Or do they all have different threads?
Ne Mo's user avatar
  • 1,385
14 votes
2 answers
6k views

Why does my inner tube have brown liquid inside? Now with internal photo

I flatted the front wheel going up a climb the other day - I heard the pop and the PSSSSHH, and I could see a geyser of pale "steam" or vapour coming out the puncture. I swapped out the tube for the ...
Criggie's user avatar
  • 124k
4 votes
1 answer
3k views

Tubeless tire looses air through weld of rim

I have the DT Swiss X1700 Spline 29″ with the Schwalbe RockRazor 2.35" PaceStar on my pre built Bike which are tubeless. After about 100 km the tire now looses air through the weld very fast. I ...
Sebastian Barth's user avatar
5 votes
3 answers
4k views

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

I typically buy tubes with removable valve cores (Qtubes brand typically) and I have some stans leftover from a tubeless tire setup for my mountain bike. Would adding Stans to the tubes on my ...
Benzo's user avatar
  • 18.2k
5 votes
2 answers
8k views

Repair cut in sidewall of tubeless tyre

On my latest ride I managed to put a cut in the sidewall of my front tyre (Specialized S-Works Purgatory 26x2.2"). The sealant (Stan's No Tubes) didn't manage to seal the cut, presumably because the ...
Phil's user avatar
  • 151
3 votes
2 answers
8k views

Tubeless tyres deflating - serious problem or just because I don't have sealant?

Both the (new) tyres I have bought deflate overnight: I have to pump them up again every time I want to ride them. This happened before I even rode them for the first time, so no punctures. Is this ...
Ne Mo's user avatar
  • 1,385
25 votes
2 answers
37k views

How often should I refresh the sealant in tubeless tires?

I've got a set of tubeless tires that have been on my mountain bike for over two summers and have had zero flats. How often should I be adding more sealant? How much? Should I be removing old sealant ...
Benzo's user avatar
  • 18.2k
2 votes
1 answer
916 views

What is the middleground between permatube and normal tubes?

I've burst my third tyre in two months on my MTB, each time it's caused by something sharp penetrating my tyre at high speed ripping a big enough hole in the tube causing the slime to leak out rapidly ...
Jan Vladimir Mostert's user avatar
1 vote
1 answer
960 views

Tyre popped when going from 26 x 1.95 to 26 x 2.125

My wheel had 26 x 1.95 tyres. I bought 26 x 2.125 thinking it would fit. While fitting the new tyre, it bulged outside at one location and the tube also came out for about 7 inches. The tube is the ...
npkbiker's user avatar
15 votes
8 answers
7k views

How to stop dealing with flat tires?

I have a very nice fixie bike, which I keep suffering from flat tires. I live in Bogota which is a city full of potholes in the road. I have been examining options to implement in order to have less ...
unmultimedio's user avatar
12 votes
4 answers
23k views

Tube sealant vs. tire liners vs. puncture-resistant tires -- which best prevents flats?

Clarification: I am not asking for a solution to punctures, or about the nuances of ride quality with the various solutions. I am asking whether one method of reducing punctures has been proven ...
digijim's user avatar
  • 685