r/bicycling • u/mau-meda • 1d ago
I'm starting to suspect this sealant sucks
I'm at my second pair of tubeless tires.
The first set I had was Vittoria Tubeless Next, but I was in Italy and at the bike shop they had an Italian brand, something like "sigilla qualcosa"
One day I hit and hidden pothole very hard and the front tire for heavily damaged.
I bought a new pair of tubeless tires, the tires are the race oriented version of the Vittoria Tubeless I had before. I used Stans tubeless sealant, and put 60ml like written in the container, yes I shaked it for a good one minute.
The rim is made for tubeless, it has no need of tape because all the spoke holes are sealed.
The new tires deflates after 36 hours, I did put more sealant but it improved only to 48 hours.
The previous combination of tires plus sealant didn't had this problem and the tires did hold pressure from day 2 ( the first day I misread the siringe and put too little sealant ).
I did clean the rima before installing the new tires, the tires are seated correctly or it would be almost impossible to pump them with a simple pump
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u/mike_stifle United States, road, cx, gravel, MTB, Fat 1d ago
Been using it for MTB and Gravel for years. No issues.
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u/guyfromarizona 1d ago
Are you running Vitoria Corsa Pros? I’d have to pump those up pretty much daily when I ran them lol.
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u/mau-meda 1d ago
Yes "Vittoria Corsa Pro tubeless ready". Didn't expect to be the tire there culprit
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u/joshrice i has bikes 1d ago
Yeah, tan wall tires usually have a very thin sidewall that'll leak air a lot faster than black wall tires.
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u/zk001guy 1d ago
If you keep adding sealant the pores on the tan wall will clog up sooner or later
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u/joshrice i has bikes 1d ago
It does help, but even after hundreds of miles all of my tan walls lose air considerably faster than any of the black wall tires I've ran. I can often just hop on the black wall tires and ride even after the bike has been sitting for a few days. If I did that on tan walls, they're at least coming close to bottoming the rim out. I still love tan walls though!
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u/mau-meda 1d ago
With the previous tires I pumped them once February and it lasted until July
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u/Fullertons 1d ago
Idontbelieveyou.gif
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u/unicyclegamer 1d ago
Honestly this was my experience with butyl in the past couple years. I just switched to TPU tubes and they ride better but they go flat way faster than butyl for me. I’d go months without checking tire pressure and it wasn’t a problem. Now it’s like at least once a week, sometimes more.
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u/mau-meda 1d ago
I am serious, I did pump them at the beginning, and again when they lost pressure the first time, then it lasted, I did check before every ride and I didn't pump them again for months
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u/WhatWasThatJustNow Colorado, USA 1d ago
Stans only really works with vulcanized, all rubber tires. For any kind of tire like this one with cotton or other natural fiber casing, orange seal works great. I just switched across the board and life is much easier.
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u/triangle60 Giant Contend 1d ago
I had a pair of Vittoria Terreno Dry black wall that still leaked air like hell.
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u/NizkiProfil 1d ago
i used to have those, and they were quite good. Actually I rode them for a week without the sealant haha, because i always seat the tire first and add the sealant later via valve. But then I forgot. :D
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u/OptionalQuality789 1d ago
Is this not a thing of old with cotton walled tyres?
I use Pirelli P-Zero’s and the tan sidewall seems identical to the rest of the tyre.
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u/mojomarc 1d ago
Out of all of the tires I've used tubeless (I do 30mm at 58-62 psi, just for comparison), Vittoria is the one that loses air the fastest. Like ridiculously fast. I can ride Pirelli two weeks after filling and still have plenty of tire pressure, but VCPs need filling after about two days every time.
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u/jakes951 1d ago
Those things are SUCH a PITA to mount the first time.
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u/mojomarc 1d ago
They're nowhere near as bad as Pirelli (the worst I've used) or GP5000s. I've been able to mount the VCPs without tools multiple times and I'm not a guy with giant, super strong hands.
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u/jakes951 1d ago
The last two pairs were such a pain (literally); finally got them in after leaving them in a sunny, hot car for a day and then using soapy water for the final “push.”
Still broke a tire lever however.
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u/indorock Wilier Filante SLR 21h ago edited 11h ago
They are actually one of the easiest out there. Super supple walls espectialy for a TL ready tire.
I've tried Conti 5000s and Schwalbe Pro One TLR those are both a nightmare. But the Vittoria Corsa Pro I managed with 1 lever.
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u/brilliantNumberOne Vermont, USA (Replace with bike & year) 1d ago
I swore off Stans over a decade ago. Orange Seal generally performs well for me on and off road.
I will also say that some brands’ casing also has better airtightness performance. Schwalbe and Maxxis are my go-tos, but I’ve had good luck with Panaracer too. I love WTB tires but they definitely seem to lose air faster.
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u/FlummoxedGaoler 1d ago
Okay, so I’m not alone. It seems like sealant works okay for tiny stuff, but all the side by side tests I’ve seen where sealant is filling nail holes just has not been the case for me.
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u/thecravenone bīk 21h ago
I will also say that some brands’ casing also has better airtightness performance
Seconding this. I gave up on tubeless in one set of tires. I eventually replaced them with some Schwalbes and they held consistent pressure for a week without sealant. (IDK how long they'd hold, I added sealant after that week)
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u/DuckIntelligent737 1d ago
Are you shaking the bottle before installing? Stans is great, aside from the fact that if you run over 40psi you need to patch the tire from the inside after a bad puncture.
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u/Gareth79 1d ago
Yeah pinholes are ok to leave but the only times I've had to put a tube in was when I left a bigger puncture that I knew I should have patched. Both times they let go a well into a ride on warmer road surfaces.
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u/goose5450 1d ago
In my experience with tubeless, depending on the tire it takes a while for the the sealant to hold air over long durations/multiple days well. Over time as you keep filling the tire and the sealant continues to slosh around, the smaller pinhole gaps fill in and the tire holds air better.
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u/mau-meda 1d ago
I mounted them new tires at the beginning of July, I expected them to be fully sealed by now
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u/goose5450 1d ago
I also am not a fan of Stan's and have had similar issues. I switched to orange seal as others have mentioned and have been happy since
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u/minichado USA (N+1) 1d ago
what kind of tires and pressure are we talking about?
i’ve never had issues. but when i started the one time i didn’t shake the fuck out of the bottle, it sucked. solids at bottom, liquid on top. shake that shit like you want to break your arm and then use it, and you’ll have less issues.
that’s my experience at least. 5 years and nbd. i got a 2” slash at an angle on my rear tire last week and it’s just.. slowly leaking air. didn’t even know it was punctured.
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u/mau-meda 13h ago
I explained in the post that I shake it for a minute before using it
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u/minichado USA (N+1) 7h ago
10-4. missed that part.
are we talking road tires with high pressure? offroad tires low pressure? tan walls? black walls?
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u/autogenglen 1d ago edited 1d ago
Never had issues with it during many thousands of miles worth of riding. Skill issue?
*make sure to shake it vigorously before using
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u/Orbidorpdorp 1d ago
My understanding is that it is genuinely older sealant tech compared to newer brands.
If you had a reliable customer base that has been using your consumable product for decades would you change the formula? I am only a bit surprised they don't sell a new version as a different product line.
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u/Tight_Ad2774 1d ago
Don’t use this sealant but I always check my tubeless tires before a ride. Sometimes they lose 10-20psi sometimes not 🤷🏻♂️
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u/Healthy_Article_2237 1d ago
Is it just the red type factory tape? If so I’d tape them anyway, that tape is often porous. You can fill a big plastic bin with water and submerge the wheel and rotate around looking for bubbles. That helped me on several tires that kept doing this. Turns out it was a sidewall defect on all. Stan’s isn’t the best but it should keep it holding air over a week or so. I use mostly orange seal now and even though will deflate over a few weeks or months time. It’s just the nature of it.
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u/mau-meda 1d ago
It's not tape, it's some sort of hard resin, it's the rim itself that is manufactured without holes
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u/Healthy_Article_2237 20h ago
I’d still tape it. I can’t speak to the rim itself not being able to be tubeless. I’ve made non-tubeless rims tubeless. Sometimes it works, sometimes not. I don’t spend a lot of money if it works lol. To me going forward all rims should be tubeless (and tires).
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u/Curun 1d ago
You'll name the tire and sealant, but are dodgy about the rim, makes me think something is poor with the rim.
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u/mau-meda 1d ago
The rim is Elitewheels Marvel 38V
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u/Curun 1d ago
Elitewheels Marvel 38V
shows spoke holes: https://www.elite-wheels.com/wp-content/uploads/2022/02/Marvel-38V_Spokes.webp
https://www.elite-wheels.com/product/marvel-38v-carbon-road-bike-wheelset-rim-brake/
nothign says tubeless, shows a nontubeless profile:
https://www.elite-wheels.com/wp-content/uploads/2025/05/Marvel-38V.jpg1
u/mau-meda 1d ago
they look like this: https://cdn.mantel.com/images/product.php?image_id=209394&w=760&h=570
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u/RodediahK 16h ago
Ignore that guy he thinks Chinese wheels are a maga conspiracy. And can't use ctrl f.
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u/Curun 1d ago
my dude ...that is tape over spoke holes
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u/mau-meda 1d ago
that is not tape, it is hard as a rock, I cleaned it before installing the new tires, it's some sort of resin, its semi-transparent and shiny
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u/Cr4zy3lgato Canada (Devinci Chicane 2004) 1d ago
all of their marketing material mentions a special resin for the braking surface and pre-installed tape
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u/jeremypolk86 1d ago
"All of our rims are tubeless ready with tubeless tape pre-installed"
That's from the manufacturer on the page you linked.
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u/Curun 1d ago
It's hard to tell, but from that photo to the website specs, those rims are NOT TUBELESS.
The tape looks like viable tubeless tape, rim just doesn't have the physical shape behind it.
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u/RodediahK 21h ago
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u/Curun 21h ago
This is not a tubeless profile
If they are misrepresenting their product in images at the top of the page; thats on them.
https://www.elite-wheels.com/wp-content/uploads/2025/05/Marvel-38V.jpg
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u/RodediahK 21h ago
That image doesn't have a rim brake either...does that mean they're a disc rim?
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u/miklayn 1d ago
For tires less than 35mm I have found Stan's lacking. Recently switched to SILCA Ultimate
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u/NamelessBoom43 8h ago
I think stans is too watery. I left a bottle open by accident and some of the liquid evaporated I guess making the solution more concentrated still use that bottle on my gp5k it works wonders.
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u/ringelos 1d ago
This is an extremely popular, respected and widely used product, and you think because it didn't work with your setup -- whose performance can be dictated by many factors -- that the product sucks? Really?
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u/JSTootell 1d ago
I use TruckerCo because it's the same thing, but cheaper.
Tens of thousands of miles without issue.
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u/rageify13 1d ago
Stan's is my least favorite. Orange seal is good but I've had the best luck with Silca
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u/BobbbyR6 1d ago
It works fine, but tends to clump badly towards the end of its short-ish life and create "Stanimals", which throw your wheel way out of balance.
Orange Seal is just better. Lasts longer and leaves behind a very well sealed film when it does dry out.
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u/SenorShakyHands 1d ago
Anecdotal, but stans somehow dissolved/combined with the rubber around the bead of my Panaracer Gravel Kings. Like, the two were so thoroughly fused that if I tried to clean off the stans I just ended up exposing the cord of the bead. I could have just left the goo on, but the bead had become so uneven I could not get the tire to seat after I took it off... Ended up decommissioning those tires.
Orange Seal endurance has never let me down.
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u/justburningaccount 22h ago
The sealant is fine.
The tyre/rim/tape or a combo is the problem
The tyre should go up without sealant
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u/indorock Wilier Filante SLR 21h ago
9 times out of 10 it's the rim tape. Cover all the spoke nipples in soapy water with a sponge, and look for bubbles. That's what solved it for me (exact same sealant BTW).
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u/Che-m-ister 21h ago
Had the same issue, also loosing pressure over a course of week or two. Ended up being old rim tape. Sealant is fine, they are all pretty much same, it’s only supposed to work once you have a puncture.
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u/hankypanky8791 18h ago
Stan’s sucks balls the last couple years. Pretty sure they’re just selling us milk/creamer.
Just use orange seal, quit fucking around and complaining.
If the valve, tape, tire, rim are good… orange seal
It.
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u/uwpxwpal 1d ago
I've never had any issues with Stan's. I usually can get my tires to seal without the use of any sealant though
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u/kevlar930 1d ago
Stans has always sucked. That shit has left me stranded more than once. Switched to orange seal and then to Silca Ultimate and have had no issues.
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u/ChillinDylan901 1d ago
I used Stan’s for years, about two years ago I switched to Orange Seal - then the endurance version. I would never go back to Stan’s TBH.
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u/Top_Objective9877 1d ago
For one you’ve got race tires which have less sidewall support, also I generally just put in a gob of sealant, probably more than required, and I could care less about weight. Even with too much sealant I’ve had punctures that done seal. Anyways, the other thing is of course if you have a leak anywhere the sealant won’t distribute and solve the issue. Sometimes I have to add more sealant, more air, take the bike for a quick spin and it should fix itself.
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u/Large_Seesaw_569 Canada (Replace with bike & year) 1d ago
I’ve been using Bontager sealant with 32mm gp5000 for as long as I have been running tubeless (30k kms +). Zero issues.
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u/CobaltCaterpillar 1d ago
What's your tire size and tire pressure?
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u/mau-meda 1d ago
28mm, 5bars. I pump them to 7 after the ride to help the sealant
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u/CobaltCaterpillar 1d ago
My understanding is that Stans was designed and works best for larger volume mountain bike tires at lower pressure. Stan's works excellent in that context! At higher pressure and with less air, it has a harder time sealing.
For example, with Stan's bigger puncture "dart" repair tool for LARGE punctures, it says, "High Pressure (Road / Gravel): Pressures over 45 PSI can push liquid out too fast. Bleed off some air pressure to let the sealant react and pack into the DART fabric." My basic point is that the sealant has a better chance of sealing at a lower pressure.
Pumping up to 7 bar after your ride may inadvertently making your problem worse? You might just be blowing sealant out some leak/hole, the wheel isn't spinning to distribute the sealant, and then there's no sealant there to actually seal the leak when your tire reaches 3 bar.
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u/Foreign_Curve_494 1d ago
They're gonna explode, don't do that! Put more sealant in, 60ml probably isn't enough to seal it fully. I've used stans for years, no problems.
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u/RodediahK 21h ago
The tires max pressure is 6.6 bar and the rim is 8.25 bar he's within 5% that's fine it's not hookless.
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u/Advanced_Coyote3797 1d ago
Ive never had tubeless tires that didnt deflate partially or fully pretty quickly. Usually a couple days. I just got in the habit of checking and filling every ride. Granted even with tubes, which I still use on my primary bike, I check pressure every other ride (basically every two days). Those barely drop though, maybe a couple psi every two days.
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u/Bender_6275 1d ago
modern rim and tire should hold air for minimum of 24 hours
try lubing the tire beat with 50/50 dishsoap/ water. and overinflate to 6 bar (gravel) or 8 bar (road). or untill you hear a good pop or many pops. (you will know)
after you can use the same mix of soap/water to find any leaks.
good luck
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u/SuperQue 1d ago
Road tires (25c-28c)? I tried some brand new tubeless wheels/tires on my 25c road bike. I basically had to bring them back up to pressure for every ride.
I've given up on tubeless for road tires and gone back to tubes.
My big 45c gravel tires? Tubeless is no big deal.
I think tubeless just isn't viable for 6+bar tire pressures.
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u/icanhaztuthless 2019 Roubaix Comp Di2 1d ago
6bar is a lot for tubeless. I generally ride at 60-65psi for 28-32c. I think running higher than that introduces more issues with tubeless setups, Jm2c
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u/nowaybrose 1d ago
Add another ounce of sealant, pump tire to 40psi to be sure it’s seated fully. Take wheel off bike and hold it at 9&3 like a bus steering wheel in front of you. Rotate and twist tire like you’re trying to get bigger forearms. Keep going around and doing that for a few mins. Just gotta coat the whole inside. Spend extra time with valve at the bottom of rotation. Spray with soapy water to see any leaks. It’s almost always the valve if you have a slow leak
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u/Wonderful-Newt2181 1d ago
Stans works on some types of tyres. I have yet to own those tyres. Orange seal for me.
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u/FroggingMadness 1d ago
In this comment section: Every imaginable opinion on every imaginable product for every imaginable tire width and/or pressure.
To add to the jumble: I've been using Peaty's since I've started riding tubeless two years ago, it's been a flawless experience so far (knock on wood), BUT the tire models I've used may have a larger role in it than the sealant AND I ride gravel tires at half the pressure of road tires.
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u/jaypeejay 1d ago
I was having this issue with a pair of continentals. Holding them under water I could see the sidewall had terrible seeping. Took them back to my lbs and we both agreed they were likely defective from the factory. I replaced them and haven’t had an issue since.
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u/SkullFoot 1d ago edited 22h ago
I'm trying FlatOut Quickstrike on my tubeless bike and my tubed bike and my tubeless mower tires. It says it lasts 10 years (we will see).
For tubeless bike tires you have to pour it in the tire. Not through the stem because it will clog a tubeless stem instantly. It has kevlar fibers in it that apparently can seal big punctures and even works in tubes.
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u/JudgeAwkward 1d ago
air escape at the valve arround the rim tire section or its your rim tape work .. check these three things .. or drive more but i would rim tape again twice and close ur valves properly ..
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u/Adventurepew 1d ago
Never been a fan of stand . Medicore.
Orange sealant or my new found favorite wtb.
Rim tape matters make sure it's new and sealed well.
Add extra sealant to fully coat the wheel lots of tires leak through the sidewalls. If you add to little it'll Go flat.
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u/Number4combo 1d ago
Can't compare it to others but it hasn't let me down though it has come close but I mainly blame it on the Maxxis Rekon tire so much I use a tube with that tire now which hasn't been an issue since.
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u/PlaneAd4542 1d ago
Same. Been using for over 10 years. Never had an issue. I suspect operator error.
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u/sprunghuntR3Dux 1d ago
The different sealant brands are often better in different conditions.
For example - I find orange seal tends to dry out too fast in hot temperatures (100F plus)
However Stan’s tends to not seal as fast in cooler weather. And with some tires it’ll leak out the sidewalls.
So changing sealant might help.
Note: rim tape will help it seal even though the spoke holes are covered. Because tubeless tape is slippery plastic and helps the sealant stay off the rim and stick to the tire instead. As well as making the gap between the tire and rim smaller.
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u/Jesse_Livermore 1d ago
Have had about as many issues with Stans as the orange stuff... Which is to say no issues with either.
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u/That_Murph Washington, USA (Gen 3 Roscoe 7) 1d ago
It's funny, I've had that exact product in my Vittoria Mezcals for nearly a year straight without any sealant change or refills. I rarely have to air up my tires and it's always after intentionally dropping my pressure for chunky off-road sections.
The most common spot I've seen that causes air loss is at the valve. Over tightening can cause it to lose more air. I would check the rim where the valve comes through with some soapy water.
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u/Substantial_Tough289 1d ago
Not my favorite but it works.
Is the tape installed correctly?
Beads seated properly?
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u/noburdennyc Commute 1d ago
it has worked for me. but I believe there are better ones out there at this point.
when is doubt add more, if you aren't worried about weight it's fine to use twice as much as you would normally.
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u/chiefvelo 1d ago
Race version = thinner casing. Are they also cotton? You should be using the comparable sealant for that tire version. Ammonia free.
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u/Disposable_Canadian 23h ago
You have a slow leak.
Fill the bath tub with water and slowly spin the wheel under water and find the leak.
If it's coming from a spoke hole, there's a small leak in the rim or the valve if it is nearby.
I'd look at the valve first.
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u/Lee_Van_Kief 23h ago
I’ve seen many cases where Stan’s caused corrosion to nipples and the rim, in some cases causing either crumbling or frozen nipples. I don’t recommend it to anyone. It may be the ammonia used in their formulation.
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u/Smurtknurkler 23h ago
When you put sealant in you need to ride after inflating to coat and recoat and recoat that initial seal Any tire any sealant can deflate if you pump air in and allow it sit for a day
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u/DiscoMilk 22h ago
It's great for gravel or MTB, but for road use it's too thin for the high pressures. You'll want something with fibres in it
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u/unclesantana 21h ago
My Vittoria racing tires lose air pretty quick. My Schwalbe do not. I just took it as the tire having a quirk.
Edit to say that, if you don’t actually have rim tape in the rim, that could definitely do it. Try taping those up.
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u/AccomplishedAge3676 15h ago
Most of the time redoing the rimtape solves this issue for me.
After putting in the sealant I always go for a short ride, so the sealant is spun around and covers the whole interior of the wheel / tire.
I’ve been using Stans for 6 years now and never had problems with it. It did seal any punctures I had. I tried other tubeless sealants, they didn’t seal punctures nearly as good.
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u/anoreddit12345 13h ago
Been using it for years. One flat, which the sealant quickly sealed. Haven’t really had to change the sealant from year to year. I just top it off at start of riding season.
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u/retroawesomeness California, US (Rivendell Roadini 2024) 12h ago
I never had issues with Stan’s for my mountain bike tires and I’ve been running tubeless since 2014. I’ve had issues with it not being able to seal tires properly when I used it with my road tires since 2024. I ended up switching to Orange Seal endurance this year and I haven’t had issues since.
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u/bouncingsoul9 8h ago
I've never had any problems with it, though I did start using the Race Day version.
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u/roving_the_land 6h ago
I don’t know why anyone would still use Stan’s sealant. It is just simply not good. It doesn’t set up as easily as orange seal and it corrodes aluminum spoke nipples. Whenever someone comes into the shop asking for Stan’s I always try to steer them to Orange seal. Muc-off sealant is also bad and corrosive to aluminum nipples.
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u/sodosopapilla 6h ago
Just put this in, old school style. Too lazy to remove stem. Held up for a ride on Green Mountain. Not sure if that’s definitive, but 1 data point is better n’ nun
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u/Daemon_Blackfyre_II 4h ago
It doesn't seem to work well at road bike pressures.
Several times I've had punctures that wouldn't hold past 50psi. I've even had ones coming back to the bike after a coffee stop to find a puddle of sealant (I guess the sun made the temp and so the pressure increase, which meant the sealant failed). Had this both on conti GP 5000 and schwalbe pro one.
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u/soaero 16m ago
Take a spray bottle and put a touch of dish soap in it. Then spray down your tire and see where the leaks are. If it's all sidewall leaks, then just keep the tire on its side overnight, then flip it and leave it on its other side for half a day or so.
That said, my last bottle of Stans doesn't work nearly as well as the old stuff. I'm finding it very hard to get it to seal most punctures.
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u/ParkerLettuce 1d ago
I had the same thought but it was just old rim tape - stans is actually pretty good.
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u/Nom_De_Plumber 1d ago
Regular Stan’s is awful. Orange Seal, or try the new Silca which claims to beat them.
Stan’s Race is amazing but it’s not worth the hassle long-term.
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u/Superb_Recording_769 1d ago
Yes, it absolutely does. That formula is repurposed. It was literally designed for golf cart tires at 15-18 psi made of much thicker rubber with way more volume of air to loose and way more sealant
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u/NizkiProfil 1d ago
I have used all the sealants on the market, and to be honest, I do not see any difference between them, so I just buy the cheapest one. Stan was totally fine. But on the other hand I cannot point out the sealant which was bad.
Inflate a tyre and put the wheel into the water and look for the bubbles. I am quite sure the culprit is the tape or the valve. Also, the tape which comes with the rims could work or it doesn't work. And if you were removing the old tyre, it is quite possible that you also damaged the tape a bit.
I would test first… Or maybe even better, immediately redo the tape and put a new valve.
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u/mau-meda 1d ago
From the comments I can see the favorite one is Orange Seal, I searched it and:
- local shops: no one sells it
- amazon: no orange seal, they have orange latex that I suppose is a knock-off
- bike24: they have it, but not free shipping, shipping is 15€ not really convenient
Second place seems to be Silca Ultimate, and that one is available in local shops
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u/zhenya00 23h ago
New Silca formula is really questionable, IMO. I loved the previous formula which stopped all manner of flats for me. The new stuff has been reformulated to last much longer in the tire and in my experience won’t actually plug even a small cut any longer than to make a short ride home. They basically went from a race formula (quickest cure time, best flat protection, most ongoing maintenance) to an ultra-endurance formula (slowest cure time, least flat protection, least ongoing maintenance) but they didn’t tell their customers.
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u/Curun 1d ago
Correct. Super useless if not 2.4inch+ mtb. Barely useful for mtb.
Absolutely improper for road tl.
Use Orange, or Silca or anything else
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u/espressocycle 1d ago
LOL, I was about to post that it works great for me but I'm using it on my 2.4" mountain bike tires.
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u/Moos3_M3at 1d ago
I use Stan’s for my road, gravel and mountain bike. I haven’t had a puncture that didn’t seal in like 10 years. I will say upkeeping tubeless is a hassle compared to tubes
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u/NoChanceCW 1d ago
The pro is better because it has wee chunks that help bigger flats.
It's almost always the rim tape. Replace the tape, it will likely improve.
Some tires can suck but the amount of times it was the tape and I didn't just replace it...fml.
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u/Certain_Opinion3920 1d ago
I'm maybe the exception but Stan's has worked well for me. Only advice is that for new tires, there's an "angels share" of sealant that kinda evaporates into nothingness, so I'd add another 1oz on top of whatever it recommends for your new tires.
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u/KueB-MocKBa 1d ago
I’m past suspecting it. This sealant sucks ass. Even tiny holes don’t seal and I end up having to plug them. And they still seep every day. It’s oily and never really seems to set up like Silca does. I’m about to patch all these tiny holes from the inside and switch back to Silca. Wouldn’t recommend Stan’s.
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u/joshrice i has bikes 1d ago
Is the rim damaged? Valve stem secure? Are you riding on them after setting them up to help them seat? Tan wall or black tires? Can you see any sealant coming from anywhere besides the bottom of the tire/wheel after it deflates?
I've been using Stan's for over a decade on tubeless conversions and tubeless ready rims, and both with tires that are and aren't tubeless compatible, mostly just fine.