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Questions tagged [sealant]

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

1
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1answer
338 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 ...
17
votes
1answer
164 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 ...
2
votes
2answers
140 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. ...
5
votes
1answer
331 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?
1
vote
1answer
76 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 ...
3
votes
2answers
1k 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 ...
5
votes
1answer
246 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 ...
5
votes
1answer
958 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 ...
0
votes
0answers
57 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?
0
votes
1answer
60 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; ...
8
votes
4answers
796 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 ...
5
votes
1answer
1k 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 ...
1
vote
1answer
1k 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;...
1
vote
2answers
1k 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 ...
9
votes
1answer
453 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?
13
votes
2answers
3k 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 ...
4
votes
1answer
571 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 ...
4
votes
2answers
1k 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 ...
5
votes
2answers
2k 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 ...
3
votes
2answers
3k 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 ...
8
votes
1answer
6k 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 ...
2
votes
1answer
464 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 ...
1
vote
1answer
143 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 ...
15
votes
8answers
5k 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 ...
6
votes
2answers
13k 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 ...
5
votes
3answers
7k views

Presta valve won't let air in on a new tube

During a ride I had a flat tire and used a brand new Joe's tube with sealant. For the first time in many years of riding i was not able to pump air in. It appears that the pin inside the valve won't ...
7
votes
1answer
1k views

Homemade Tubeless Tires

As I was browsing Youtube for cycling related videos, this one on making your own tubeless setup caught my eye. The procedure is essentially as follows: Clean a standard rim (not for tubeless tires, ...
5
votes
4answers
9k views

“Quick Fix” Tyre Repair Spray Cans

I saw this in my local supermarket, as they are having a cycling event on at the moment. I was thinking this would be quite useful if I had a puncture away from home, the car or bike repair shop, or ...
1
vote
2answers
6k views

Is there any advantage to preparing the tire bead with sealant during installation on the rim

I am on a hard tail 29er and this is my first time going tubeless. I will be mounting 2.4 Maxxis DHF to a carbon 35 mm rim. Where I am going is remote, quite rooty, and there are lots of technical ...
0
votes
1answer
82 views

Do I Need to Use Sealant?

If I'm using a pair of "fully sealed tubeless rims" do I need to use sealant? I'm seeing some sites state that it is unnecessary. This question is really spawned by the statement that sealant ...
15
votes
5answers
7k views

Do road tubeless tyres lose air faster?

I just replaced my rear wheel with a road tubeless (Bontrager RL TLR). Was lucky to have the bike shop installed the tyre, took two blokes to put it on the rim. Anyway, my second ride was a couple of ...
4
votes
3answers
3k views

Leaking Slime inner tube valve after opened for first time since install

I put some extra air in my rear mountain bike tyre yesterday. It uses the SLIME inner tube. It wasn't flat nor had a puncture, I was just topping it up to make the tyre a bit harder. I cycled to work ...
6
votes
1answer
1k views

When not in use, How should I store my tubeless tires?

I have a bike setup with tubeless mountain bike tires. I tend to ride about 20-25 PSI. How should I store my tubeless tires? Does it matter what pressure I store the tires at between rides? Should ...
5
votes
1answer
226 views

How Can I Prevent Slime Barrel Pumps from Clogging?

I work at a bike shop that Slimes tubes. We have both pre-filled Slime tubes as well as a keg of Slime that we use to fill tubes on customer request. Unfortunately the tube connected to the pump for ...
3
votes
2answers
9k views

unblock slime presta valve

My Son's bike has slime inner tubes. The bike has been sitting in the garage since last summer and the front tyres valve now seems blocked. Its has what feels like 15-20 psi in it but I can not get ...
8
votes
7answers
38k views

Can you run a standard tyre on a tubeless rim?

I have some new tubeless MTB rims and I'd like to avoid buying new tyres for them. The tyres are reasonably sturdy (Continental Race King Protection - 4 plies / total 240tpi) and I have sealant. As I ...